How does Shimano Di2 Actually Work?| Electronic Shifting 101

3 роки тому

Electronic Di2 Shifting is commonplace on high end, and even mid-range road bikes now, but how exactly does it work? Alex explains the basics of a Di2 groupset and it's workings, including clever tech borrowed from the car industry!
Do you use Di2 shifting on your bike? Let us know in the poll
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КОМЕНТАРІ: 507

@gcntech 3 роки тому

Did you find this interesting? What else would you like us to look into? Let us know in the comments 👇

@Doniyorbek_Turgunov 3 роки тому

Info about binary code which flowing between batt and junction looks very expired...sorry...))

@danjdavison 3 роки тому

I want to see the derailleurs taken apart, and know exactly how the motors work in them

@CyclingLifePT 3 роки тому

I'm sticking with mechanical. About once a year a cable snaps while travelling and all i have to do is replace the cable which is light, easy and quick to fix. I dont have to worry about recharging my bike and be afraid of system failures. I would appreciate some electronic levers, something that could be overriden if there is no battery, but also something that could be acted upon with more confort from the tops (by adding a set of buttons to the tops, the same way they have buttons for the time trial bikes)

@danjdavison 3 роки тому

@@CyclingLifePT I’ve worked in bike shops for 8 years, and I’ve never seen anyone have an issue with Di2. Also, you only have to charge your bike every few months, so if you can charge your phone every day, you’ll never run out of battery with Di2.

@KenSmith-bv4si 3 роки тому

#AskGCN, Does the FSA K-force We operate the same as Shimano Di2?

@donnasmith1602 2 роки тому

As I am aging, my hands are starting to get some arthritis in them, so am now seriously looking at switching to Di2 so that I can keep riding with less pain. This was a very helpful video. Thank you.

@Imnotplayinganymore Рік тому

Ditto Donna! Let's show those kids some real grit. Aging is not for the faint of heart. Keep riding, we'll never die!

@nathan-ls8yw Рік тому

have you thought of getting the specialised diverge? the suspension could help

@shanebibby4255 Рік тому

Likewise Donna just moved onto di2. Absolutely fabulous 100% right decision go for it 👍

@gbart981 3 роки тому

I've always admired bikes for their simplicity. I've ridden bikes as transportation since the 70s, watched tech change. I feel bikes should be affordable, easy to work on and modifiable. I have never been stranded because I couldn't get my bike back in working order with the tools I carry with me. Nice electric stuff but feel it doesn't meet the ease of maintenance mechanical systems afford, certainly not as cheap for us working stiffs.

@SixSioux 2 роки тому

I think Sram Etap fits perfectly your description, unfortunately is Still stupidly high priced.

@Alex-kr7zr Рік тому

Agreed. On the contrary, electronics are a lot more durable and maintenance free (not speaking about consumer electronics here). Considering that the shifter is a very common problem source in bikes, I'm curious to see how the electronic shifters will hold up over time. The pricing is still a bit high atm though. Working as a roboticist and also in the automotive industry previously, usually choosing a solution follows that order: software, electronics, mechanics. So I'm actually very pleased to see electronics entering the cycle market, it will be a matter of time until software follows, and we will have all sorts of software based tuning.

@switch6690 8 місяців тому

@@SixSiouxI'm far from being a Shimano fanboy, but SRAM eTap is exactly the opposite of being simplistic imo. In fact, I think it's one of the worst products ever designed: Modern road biking already needs way too many batteries being charged, and having 4 additional ones for my shifter alone doesn't make it better by any means. There's a good reason why cabling in vehicles exist; nobody would even think about charging each backlight of their car individually. But in the bike world, for some bizarre reason, such annoyances are totally accepted and even desired. A good Di2 cabling can easily last more than a decade only requiring a single battery, and I really hope Shimano sticks to this way superior approach.

@grahamballard7041 3 роки тому

I’m sticking with mechanical as I simply can’t afford to upgrade to di2

@PaulJWells 2 роки тому

Great video. Gave me the information I needed (in practical terms, it doesn't matter which cable goes into which socket on the junction box) I'm running an unusual, but supported configuration of Dura-Ace drop levers with an Alfine 11 speed hub gear on my tourer. Just upgraded a five-year old bike to have Bluetooth connection by replacing the original A junction with an XT indicator (Sc-mt800) It was child's play to fit and works perfectly. Shimano really have provided us with an amazing technology.

@htmonaro1969 2 роки тому

The CAN BUS system has been used by model train systems for decades, it called the DDC. The tracks carry bot the electrical power to drive the motors and the digital signal to tell each train how to behave - go slow, go forward etc. It's incredibly simple yet also technically sophisticated.

@c7dermatome Рік тому

I don't race bikes any more, spend all my days on computers and/or fixing electronics. Was a bit suspicious of electronic gear shift at first, but honestly I think it's superb, have seen the electronics inside the housings (trust me it's very hard to get at for good reason) and I would be confident in saying that what Shimano has invented is near infallible. It's great that the connectors are all interchangable and wires are 2 core (these are maybe the only bits that might get broken easily and bieng this way are easy to fix and replace) Thankyou for such a great series of videos on Di2

@amilcaresada7778 3 роки тому

Wow, that is great content. Good Job Alex!

@pavelhornicek554 3 роки тому

Great video, simple and useful description. I am looking forward when I will have electronic shifting.

@douggerard3411 2 роки тому

As the prices come down I am more likely to adapt to the Di2 system on my bike from a mechanical Ultegra system. I like the idea that the derailleurs won't get out of adjustment due to cables getting old and make shifting a little more secure. It is not a good time when my chain falls off the big ring when I shift up on the front derailleur, which happens no matter how much adjusting I do to it.

@bill_automated1226 3 роки тому

Insightful video. Thank you. I had no idea that the Di2 group set used the CAN protocol. Makes sense, but so interesting that a bicycle uses the same protocol as an auto! I love technology,

@glenlarimer1358 3 роки тому

Very interesting program, Alex (and staff)! What you said about previously being an auto mechanic is exactly why I don't want electronic shifting or disk brakes on my bike. I don't want to be an auto mechanic! I like having a very simple set of tools along with me on a ride, confident that I can repair any small problem and be on my way. I don't want to worry about batteries or bleeding hydraulic cables, etc. should something go wrong.

@tonyjones9442 3 роки тому

Underrated comment.

@cezarywieczorkowski5642 3 роки тому

Dude suspention is when the servicing nightmare begins

@amaclach 2 роки тому

Is that why you drive a car that is hand cranked, has a carburetor and a distributor? Di2 is pretty reliable. Mechanical systems have their own issues.

@davemillet1502 3 роки тому

Great explaination, only been riding Di2 for about 6 months and helps me understand why my firmware updated and how I can change what each shifter does. Now just have to remember to charge up every month or so as lost power to front as battery dropped below 25%.

@izi941 3 роки тому

FD works until 4% Battery capacity...above 20°C that equals 2-3h easy riding, or 1h in racing environment. (Depends on profile/nr.of shifts)

@devononair 2 роки тому

@@izi941 2-3 hours? That's not very long at all!

@mauricetremblay1324 3 роки тому

With the videos you have posted I now want a Di2.

@user-ni2sc3me6x 5 днів тому

Many thanks for this informative video. Just purchased my first Di2 bike and excited to learn more!

@thegingaman 3 роки тому

Two out of Seven are Di2 and are planning my TT bike to be converted to Di2 next. I'd have Di2 on them all if I could.

@racovert1 3 роки тому

This was great. Simple explanations with a good visual display. What are the chances that we see a wireless setup soon?

@FinlayDaG33k 3 роки тому

"high tech communication protocol" Oh stop it, you made my desk light blush :3

@erik_midtskogen 2 роки тому

Thank you for that. Just one minor technical quibble: CAN stands for "Controller Area Network", rather than "Controlled Area Network".

@scotthamilton1054 3 роки тому

Great clear explanation. Nice vid.

@cannongavinjr7166 2 роки тому

i use mech and Di2 love both ways of shifting!

@user-cx2bk6pm2f Рік тому

This is great, Alex. Very interesting and well done.

@mikeshaw714 3 роки тому

Brilliant description, i actually thought the system was wireless. Regarding CAN, I write firmware for a living on CAN based systems and it’s not the easiest thing to explain to people so you done a good job there.

@Cammboz 3 роки тому

Hi Mike, do you know how the power supply and data share the same wire, would be an interesting detail for general to add

@mikeshaw714 3 роки тому

@@Cammboz ukposts.info/have/v-deo/fJynjZWOaWiHr5c.html It's a bit techie but worth a watch.

@Cammboz 3 роки тому

@@mikeshaw714 interesting, thanks. I guess the power in the di2 system must be derived from a higher potential difference between the high and low wire.

@paulallen6378 3 роки тому

CAN bus usually has differential signal lines (high & low), presumably Shimano have a proprietary implementation for their system with only two wires - one with ground and the other with the supply voltage that also has the signal on top? There will be less electric noise than in a car so the differential system is less important.

@pedrolahoz 3 роки тому

Love my ultegra rx di2. Love it

@gerardotelese5337 3 роки тому

Still feels like something from another geological era compared to the SRAM wireless system (not thinking about how well the idea is implemented and function, rather only about the idea behind the product). Feels like they just changed a lot of cables for a lot of wires.

@adamsteineke4661 3 роки тому

Except the wires don't stretch like cables do, I'd also prefer to charge my internal battery a few times a year versus having to remember to charge multiple batteries for each ride... that said, it is a lot less cabling to deal with!

@neil7769 3 роки тому

I have Campy EPS which also uses wires. I can't really see what the advantage is with wireless THB, except that it's easier to install. Once it's installed, who cares if there are wires inside the tubes? And you just have one thing to charge and never need to worry about pairing / connection issues.

@zachm.3049 3 роки тому

@@adamsteineke4661 battery wear and electric dependency is not an improvement. Shifting mechanically is way better, gives more feeling to the gears and provides faster control than electric could offer. But hey, if it makes you happy. Go for It. I was hoping this video explained the DI2 shifting mechanic in detail, So I could use it on a IGH-8 speed or IGH-11 speed Alfine using mechanics only, to shift old style without electric. Not sure if this combination is possible, so still hesitate what to buy for IGH.

@erik_midtskogen 2 роки тому

@@zachm.3049 That's what I used to think about electronic shifting. Then I bought my teammate's time-trial bike, which was outfitted with Di2. Once you get used to that, you're spoiled. I once got dropped in the Grant's Tomb Classic (a late winter crit race) when my mechanical shifting acted up in sub-freezing weather. Di2 just works, instantly and smoothly, every time, under any conditions. No more fiddling around with it constantly when temperatures change or cables stretch. No more afternoons spent threading internal cables through frames a couple times a year. The mechanical shifters and derailleurs on my main road race bike are worn out now. I'm replacing them with Di2--if and when my LBS can track down the necessary parts. I'll be doing more riding, and less fiddling around. I can't wait.

@erik_midtskogen 2 роки тому

@Gerardo Telese I've learned not to trust anything too important to wireless technology. I could picture riding alongside other riders with the same groupset and the systems interfering with each other. Wireless systems generally don't depend on using different frequencies to isolate from each other, but rather, different IDs in network header packets. When several of these systems are used in close proximity, it gets harder for the electronics to filter out the content from the noise generated by nearby wireless networks. For this reason, my whole home is wired except for the few devices that lack an RJ-45 socket, and require wifi to operate. My wired stuff always works, while my wifi-only devices suffer from frequent dropouts and generally unreliable operation.

@pedrolahoz 3 роки тому

Rides of Japan. Has a very comprehensive, practical explanation for those who want to do their own di2 installation.

@mackie4323 2 роки тому

Im a new rider and I did not know that the bicycle I ordered online comes with an electric shifter. Having seen this video made me aware how it works. Thank you! I still have not decided wether I should stick to electronic shifter or go back to manual. I will update my post in 25 days after I rode my Grizl enough.

@fepatton 3 роки тому

I wanted to add a Bluetooth module to my Di2 setup and was fretting over how I would get it to work until I realized the setup was a CAN bus, and it would just work. All I needed was a junction box and short length of cable. Bike is now Bluetooth/ANT enabled, and I can control my Garmin with the top buttons on the hoods, and get gearing and battery data on the screen. Cool!

@alexanderkoch4830 3 роки тому

The only shame is, that it's not included by default and they charge a fortune for the short cable you need in addition.

@SeanBlader 3 роки тому

How does it do power and digital signalling over the same wires? Also the cylindrical end of the tool is used for pushing the plugs in, and the sharp end is used for prying the plugs out.

@cobaltpica 2 роки тому

i have always wondered which cables goes where and which junction box needs to be installed. Thanks for confirming that it doesn’t matter. To simplify things even further the Di2 system and its wirings are just like a municipal water distribution and its piping.

@djiembefola 3 роки тому

It's very expensive. However, I like the ability to easily run mountain bike derailleurs with road brifters, smart shifting patterns to avoid extreme cross-chain gears, etc. I like the idea of wireless, and am not crazy about running DI2 cables internally when doing builds and upgrades. Time will tell if 105 Di2 is really going too be "affordable"......

@dennise1816 3 роки тому

Mechanical shifting has worked well for my 50 plus years with Shimano Dura-Ace. No reason to change

@Jeebus0143 2 роки тому

Thank God the entire world does not think like you otherwise we wouldn't have so many benefits that technology has brought us in every aspect to life.

@floheigl 3 роки тому

Hey guys, here comes a Di2 Question: I have Di2 on my TT-bike with the newer 1-button shifters on the extensions(SW-R9160) as well as the brakes (ST-R9160). This Pretty much mandates the use of full synchro-shifting if you want to shift the full range of gears from the basebar aswell as the extensions. For this to work, you also need to assign all 4 buttons to only shift the rear derailleur. This however makes the Manual mode quite useless as you have no way of shifting the front mech. Is there any way to achieve a setup, where the basebar shifters shift the rear mech in full synchro and the front-mech in manual or semi-synchro mode?

@philrobson7976 3 роки тому

I still don’t know how the dérailleurs move. Magnets? Motors? Where’s the power? Let’s deconstruct the units now.

@bengarside79 3 роки тому

They use servo motors

@antonhelsgaun 3 роки тому

@@bengarside79 thanks. That was all I was looking for

@einundsiebenziger5488 3 роки тому

@@bengarside79 That's exactly what this guy could have explained instead of binary coding.

@wokitlikeyoutalkit5619 2 роки тому

hi, will a di2 10 speed rear derailleur work on a 11 speed cassette if the shifters are changed to 11 speed ones? thanks heaps !

@johnbeer4963 3 роки тому

So.. Would it be possible to connect a single derailleur (or one of the nexus/alfine hubs) to a battery and to a 2 button shifter via the 3 way cable and that be it? is there any electronics in the other cable?

@timothymatthews4399 2 роки тому

I have a shimano Alfine 8 IGH. Is it possible to add on to this a Di2 shift system or do I have to buy a purpose built Alfine8 Di2?

@mistagregory 3 роки тому

Ultegra/XT Di2 on my OPEN U.P. and mechanical Campagnolo Athena on my Pegoretti Luigino.

@yoroshikune08 3 роки тому

Nice video.. Finally can see how it works. May I know what watch are you wearing? Thanks.

@stevederr4927 3 роки тому

Love my di2! Love having it talk to my Garmin. It's great to be able to see the di2 battery level on the Garmin. Even better to be able to see what chainring your in and what gear you are in on the rear derailleur, right there on the Garmin, no need to look back. I also run my in semi synchronized. I'll never buy another bike without di2 or SRAM equivalent. Would you do a video on the pros and cons of running the di2 in manual, semi and full synchronized? Would also be nice to run through the software.

@mrcstb7479 3 роки тому

Hey Steve, which Garmin device do you use? Thanks!

@stevederr4927 3 роки тому

@@mrcstb7479 I have a Garmin 520, but it is my understanding that Garmin, Wahoo and Karoo all communicate. I did have to buy a Shimano ‘interface’ item (~$100) that is connected inline on the dI2 cable. Best $100 I ever spent. I love knowing my dI2 battery level and what gear I’m in both on the front and rear derailleurs.

@supermusic0815 Рік тому

Hello, i have a simplon E-Bike from 2017 with e8000 DU and XT di2, is it possible to do Shift automatically (Like s1 or s2 Mode), or is it only an electric shifter but not Automatic Mode?

@bobtahar 2 роки тому

I'm planning to use EW90-B 5 holes Junction A box and eliminate the SM-JC41 Junction B box. All the cable will be connected to Junction A... will it works?

@einundsiebenziger5488 3 роки тому

What about the electric motors inside the shifters and their power supply? Would have been much more interesting than "Can Bus" and binary code.

@Wightkitesurfer 3 роки тому

Agreed! The magic is the accuracy and strength of the motors, most people can appreciate clicking a switch sends a signal, no need to waffle on about binary nos.

@tristancamp-lagueux6562 3 роки тому

Can you do the same vid but for Etap?

@edwardbayley3799 2 роки тому

Does it still have to be adjusted and dialed in or does It always shift perfectly no matter what?

@andrewbrowning6947 3 роки тому

No mention of bluetooth module, programmable hood buttons, different shift modes etc

@weekenderfam7965 2 роки тому

How about the upcoming wireless Di2 or SRAM etap? I am still not sure how well wireless will do, I mean I have concerns on loss of signals or interference. If you are out in a group ride and everyone has wireless, will there be any issue?

@iwanrusli8322 3 роки тому

Is it (DI 2) competible with any frame? Thank you

@iwanrusli8322 3 роки тому

Can this (DI2) fit into any type of racing bicycle frame? Thanks

@dahomiekrillz Рік тому

Are there di2 compatible systems for a tri bike that only has shifters on the end of the aero bar?

@longerranger 3 роки тому

Di2 will also help in running much easier gears for long climbs. I live in the heart of the Alps and run a 10/42 rear cassette with 50/33 up front (11/42 with 50/34 is great too). The Di2 default means you can’t use the 2 smallest rear cogs when in the smaller front chainring, and so chain slack is not an issue. You do need a hanger extender and a medium cage rear derailleur combination as well : ukposts.info/have/v-deo/enOVZ2h4hIaBmY0.html

@OhShunz Рік тому

I’m considering an upgrade of my current Ultegra 11spd. Mech to the 11 spd di2 but thinking about the wireless 12spd seems like such a fun aspect.

@nathanielmay2793 3 роки тому

#askGCNtech I am in need of your superior knowledge of all things bike. I am currently converting my 1997 mountain bike into a road/gravel bike and have bought some 3x7 speed road bike shifters. The right shifter works OK with the old stx rc rear mech but the left shifter is really not compatible with the front mech/ chainset. Arr you able to tell me what components I might need to replace to get a working system??? Is it a case of bottom bracket, chainset and front mech or maybe just a different shifter???? I will be submitting it once finished Loving! Loving all the content- keep up the great work!!!

@aspenwagon04 3 роки тому

Its refreshing to hear the term "binary" in the correct context here. Thanks.

@tonyjones9442 3 роки тому

I sef identity as a hexadecimal human.

@Numeriwar 3 роки тому

2021, we have everything wireless today but di2 is still stuck with wires everywhere (and 11spd...) How do charge the battery? at least with sram they are easily removable

@hypnotic247 3 роки тому

I have the Di2 but on hub gears. Auto mode is all over the place, coming up with W012 error code. I am extra heavy, could this be why?

@luigicolbni5345 3 роки тому

you ignore campagnolo drive trains like you ignore traffic lights :)

@srpskihayk 3 роки тому

I thought Di2 was wireless, or I'm thinking of something else. I have learned that to upgrade my existing Ultegra group set to Di2 will cost the equivalent of another Ultegra group set! All that gets swapped out are the mechs and shifters. Wow!

@bossg2817 2 роки тому

Only sram etap is wireless.

@AlainSTO 2 роки тому

I must be the only one who finds this easier when it comes to maintenance than mechanical shifters. Adding pros and cons to this video would've made it perfect for me.

@Alex-kr7zr Рік тому

Of course, it is. That's the reason why electronics have replaced almost everything in the automotive industry, for example. Over time, this will also be cheaper to produce than the mid-range mechanical systems.

@scotthamilton1054 3 роки тому

I’m slightly skeptical only because I like to keep my bikes forever and I wonder how, in 10 years, will the stuff hold up or if the specific version will become obsolete. I have bikes from the 80’s and 90’s that still work amazing and haven’t needed any maintenance at all. I guess I’m an archivist and with new computer based mechanics I question the longevity. Also if I crash and damage a rear mech the ala cart replacement costs is huge.

@petinka721 3 роки тому

Would it work better for Ollie if he had sprint button for perfect gear for keep it up and not be dr*pp*d again?

@J88HNT 3 роки тому

I have both SRAM RED AXS ETAP and Shimano Ultegra mechanical. I changed the gear cables recently for new ones on the Ultegra set up and the shifting quality became so buttery smooth again. There is something about mechanical shifting that makes me feel more connected to the bike. Don’t get me wrong electronic shifting is second to none but where it gains in terms of efficiency and performance, I think it loses the true essence of what a bike is.

@vvictoria6214 2 роки тому

I cycle a lot myself and watch cycling races on TV, but since electronic shifting, much more shifting problems, used to be almost non-existent befor !

@vinceasmith 3 роки тому

interesting, did not realise it was Canbus. Also the same two-wire cables carry the power from the battery to the electrical motors in the derailleurs.

@dougbrown7150 2 роки тому

Can the battery still fit if you use a dropper post?

@mrcross5716 3 роки тому

Awesome video can you do a di2 installation from scratch please

@gsmd770 3 роки тому

I use the Ultegra Di2 system on both my bikes.

@thompson9451 11 місяців тому

Love that Alex goes all the way down to bin explaining how di2 works lol

@atassisamer 8 місяців тому

What about longevity of electronic derailleurs vs mechanical derailleurs? How many miles would electronic derailleur last until needing to be replaced ?

@frostwilleatyou 7 місяців тому

probably never, unless u crash it, but when it comes to battery that’s a diff story

@TreFlip1992 3 роки тому

I read somewhere that everytime you change gear on the back, it trims the front mech slightly to prevent chain rub in the event of crosschaining? Is that the case? Im still running R8000 mechanical. Would love di2 but cant afford it 😭

@josephphillips865 3 роки тому

The front and rear do adjust slightly as needed after shifts.The front does not adjust every time you shift the rear. I think it just adjusts when needed depending on what gear you are in.

@TreFlip1992 3 роки тому

@@josephphillips865 Ahh, fair enough. Thanks for clarifying that 🤜🤛

@AlejandroMallea 3 роки тому

It would be very interesting to know why is it that electronic shifting is supposed to work better under stress, for example at low cadence on a steep climb while pushing high watts. I can only imagine that the force the derailleur applies to the chain as it moves is way more even with an electronic system, as a mechanical system will have a transient or peak until the first few links engage, at which point there should be a lower feedback going "back" to the levers. This would be particularly true while shifting "up" to a lighter gear in the cassette while going very slow, though of course intuition and physics don't always go hand in hand. So Alex or Ollie, I would really appreciate it if you could unravel this mistery! (Alex might need some science glasses though)

@herculesmclovin Рік тому

I absolutely love hearing people answering these types of questions, I'm nerdy in this way too. I hope someone can come along with a good tested theory for us!

@herculesmclovin Рік тому

I follow your idea.. The force being applied must alter along with the force coming back from the chain, to keep it in a precise force range for the smoothest transitions. That has got to be more rapid and precise than us.. Because we receive feedback from our feet on the peddles, through to the legs etc and by the motion of the bike. That then has to be processed and turned into a correction of force output, which by then.. *clunk* awh not again!!

@user-cx2bk6pm2f Рік тому

Global Cycling Network written in binary.. nice 👍 The heavy lifting of coding, though, is done in hexadecimal.. which is even cooler than binary!

@normanyang7939 3 роки тому

As a E/E Architecture engineer of automobile. Honestly, although CAN bus is considered as a stable bus system, i still think it's a little over design for the Di2, bicycle shifters don't have that much of the information to transfer. Admittedly, CAN system might could save 2 power wires and a ground wire compared with conventional connections, but it need a modem to deal with the D-A signal. which is also extra weight.

@Ryan97beyond 3 роки тому

my wallet decided it would be better to use mechanical shifting. 🤷🏻‍♂️

@paulkemp8784 Рік тому

How long does the battery last for? Maybe not ideal for touring/adventure bikes

@wescoleman6390 3 роки тому

I'm sticking with mechanical shifting on my road bike for the foreseeable future. It's less expensive, easier to troubleshoot, and it's one less thing I have to remember to charge. Forgetting to charge my head unit or speed sensor is merely inconvenient; forgetting to charge my group set can end a ride. I might change my mind if I had to manually adjust out front mech rub on highly cross-chained 13+ speed group sets.

@ImranWorldCyclist 3 роки тому

I used to stink the same until I rode with di2... it’s a game changer. The battery lasts a very long time and the battery level can communicate with your bike computer so you know where it’s at!

@mindofmission Місяць тому

Mechanical currently, 1X. Cannondale SISL2 50/34 compact crankset, Ultegra SS RD & 11-34 cassette.

@rzeckner 3 роки тому

I've had Ultegra Di2 for almost 6 years now and purchased it as a luxury item. However, because of its flawless performance without constant fiddling, it has now become a staple ensuring me of enjoyable ride every time and I won't purchase another bike without it. Nevertheless, I am unlikely to upgrade another bike that is dedicated to my Kickr from mechanical to Di2 any time soon.

@adamsteineke4661 3 роки тому

I splurged on di2 last year and am VERY happy with it.

@throx 3 роки тому

As far as I recall, the shifter signal goes to the battery, which processes it and then sends out a different "shift rear down" signal. That's how you get multi shift and other fancy stuff.

@izi941 3 роки тому

In first gen (7970), the CPU was in the front derailleur, all newer have it in the RD 👍 battery can also be 3rd party (like with e-bikes: Shimano, BMZ or Bosch made batteries)

@razorree 5 місяців тому

can you explain price of the battery ~150-200 eur?? (for 2 cells, worth few quid and housing....)

@andredevasconcelos7804 3 роки тому

You should actually use the other end of the tool to plug the cables in. The "fork" side is intended for disconnecting the cables.

@andengpintado7833 2 роки тому

Can you also do Di2 for triathlon

@wilsonlio1983 3 роки тому

Can GCN do SRAM etap? Thanks

@mortonbeard2240 10 місяців тому

Are cables ever used in professional races anymore? Thanks.

@kiragameplay6330 Рік тому

can someone tell me which orbea bike that is at 6:20

@fernandoespinosa3403 3 роки тому

I’m too old for that when the traditional system has worked flawlessly forever for me.

@Horstelin 3 роки тому

Until you have 100% integrated cables... The question is of course if you really need them

@J88HNT 3 роки тому

I have both SRAM AXS ETAP and Shimano Ultegra mechanical. I changed the gear cables recently for new ones on the Ultegra set up and the shifting quality is buttery smooth. There is something just a little bit nicer when changing with mechanical gears. I feel more connected to the bike.

@josephphillips865 3 роки тому

@@J88HNT That's one reason why I'm sticking with the mechanical Dura Ace groupset on my road bike. The downside is spending money and time replacing cables and housings with routine maintenance unless you happen to find that job therapeutic. I like the tactile feel and sound compared with a dull electronic button to shift. I did however splurge by getting GRX DI2 for my new gravel bike build. I do like the low maintenance aspect and features of DI2. It was a bit of a pain dealing with wires but now that it's setup it just works.

@Livlifetaistdeth 3 роки тому

I'll never understand why you would render the greatest mechanical creation of all time useless without a battery.

@oioi909 3 роки тому

This is my feeling too. I am fascinated by the Di2 system but something has been holding me back for years, its the idea of batteries, It just destroys the purity of it. A sort of desecration of the whole idea of the bicycle, its perfection, the mechanical art of it. And there is something else which holds me back from buying one - we are being told indirectly that its an improvement, by the mechs being 2-3x the price, for a problem that doesn't exist. Seems like a sort of snake oil, and I would feel a little bit like a sucker if I fell for it. That said, no problem with choice, its up to each of us, the Sram idea seems best because there is a clear advantage provided, no cables. I can kinda see why that would be a good thing, less to go wrong, and less hassle to fit, and the batteries within easy reach.

@dudefella420 3 роки тому

@@oioi909 spoken like someone who has never ridden di2. It’s just better. It ruined mechanical shifting for me.. I could never go back. And I only charge it once a month, which is more often than it needs.

@oioi909 3 роки тому

@@dudefella420 Well I did say I am fascinated by it , been riding road since 1987, I like classic bikes but am not against progress, quite happy with my 7800 Dura Ace with a couple of small mods I have it set up to perfection, pretty much never miss a shift, its super quick and quiet... but I have decided to try Dura Ace 9150 and see for myself..!

@BrentonChan 3 роки тому

Di2 is still a pipe dream but I love my Ultegra mechanical.

@BetterShifting 3 роки тому

Cables being interchangeable is pretty obvious.. there's such a huge range of bike sizes and cable routing differences depending on the bike type. What is much more interesting (and useful to know) is that you can connect any component to any other component. There is NO 'correct' order or mandatory routing layout. You could connect the battery to one shifter, connect the rear derailleur to the other and it would still work (assuming you put a junction A in there somewhere). Strange? Sure - but it'll work. ;-)

@chrisj5443 3 роки тому

I've just been using your website info on seatpost battery install as reference as I move Di2 battery to a new seatpost on my Specialized Roubaix. The Di2 came with the bike, and so would have been factory installed. The holder they used was different than any of the ones you show. It's a ribbed rubber style, but is a plug clipped onto the back end of the battery, plus a separate rubber doughnut-plug on the cable end. after some head-scratching, I made an L-shaped tool out of a piece of coat hanger, held the L in the radial recess near the front end of the battery, and was able to pull the battery out. I think I'll get one of the 2-piece front end holders (Ritchey) to install in the new seatpost.

@BetterShifting 3 роки тому

@@chrisj5443 interesting! Some manufacturers have their own, yeah.. I also know a few people that had battery holders 3d printed to fit their weird seatpost shapes :)

@stubbietubbie 3 роки тому

That was genuinely interesting. So, a general overview of the other electronic groupsets next, yes???

@openwheelracing88 3 роки тому

No reason such system can't be affordable.

@MrBJPitt 3 роки тому

It is, compare di2 ultegra to sram force axs

@Fatbutnotflat 3 роки тому

"high tech".. as in bike companies intentionally putting electronic shifting on top ends only.. better to wait for chinese electronic conversion kit

@MrBJPitt 3 роки тому

@@Fatbutnotflat you'll be waiting a while. In the meantime, I got ultegra 6870 di2 minus the cranks for $500 on FB marketplace. And dura ace 9150 minus brakes and cranks for $700 on FB marketplace.

@roythearcher 3 роки тому

"Affordable" is a very subjective word. If you can't afford it it's not " affordable". Cheap is a better term. But this system is by no means cheap!

@markmichalowski4822 3 роки тому

I'm sticking with the non DI2, DI2 is way above my budget. Great videos

@trepidati0n533 3 роки тому

Buying them gently used is a great way to get it for a decent price. You can save 2/3rd's the cost by getting a 2 year old version.

@markmichalowski4822 3 роки тому

@@trepidati0n533 I may have to look into that, Thanks

@JJ-rf7dg 6 місяців тому

if the battery is dead , can gears be change manually?

@chrisspeksnijder1717 Рік тому

Two bike in the garage. One with, and one without Di2. Both are very nice to ride with...

@dpw6900 3 роки тому

Mechanical until it trickles down to 105

@brendangray 3 роки тому

Can I ask? . Do you mean get mechanical unless you are getting a groupset above 105? Thanks 🙏

@ritzk79 2 роки тому

@@brendangray meaning mechanical until we get 105 di2

@morgandebruler9281 2 роки тому

@@brendangray basically anything above 105 is very expensive (and in my opinion unnecessary) but the tech tends to 'trickle' down so in about 5 years you'll see Di2 on more affordable groupsets

@jamestravill9640 Рік тому

@@morgandebruler9281 took 10 months..

@bikeandsee1647 2 роки тому

If I dont have arthrritis in my hand, what for I need this ?

@playandteach 3 роки тому

I hear from friends that it is a game changer, although I'm perfectly happy where I am. What I don't understand is why we are still using cables? Can't we move to bluetooth or Ant +?

@adamsteineke4661 3 роки тому

Sram uses wireless, but that adds multiple batteries to the mix.

@playandteach 3 роки тому

@@adamsteineke4661 That makes sense, though I'd rather have the batteries and no hassle of cable threading.

@neil7769 3 роки тому

@@playandteach I'd rather have the one-off hassle of cable threading than the permanent hassle of multiple batteries and potential pairing issues.. Just like wired ethernet vs. WiFi, wires are best unless you have a good reason to ditch them!

@omurize2007 3 роки тому

@@playandteach what's more hassle is having to remember to recharge multiple smaller batteries each time versus charging a single big battery, and the connection dropping randomly when there's high interference around which makes you unable to shift, plus as one of the comments said, how often do you change your entire groupset that having no cables does matter?

@michaelborg3017 3 роки тому

Thanks for the video, but I do have one question, what do you do with the battery when not using your bike for roughly 3 - 4 weeks? Do you need to drain it and re - charge it? or just keep in installed in your bike? (assuming you have good charge in the battery)

@quesoner34 3 роки тому

No care needed.

@BetterShifting 3 роки тому

Yeah.. no care needed. Shimano say charge it every 6 months (to 50% or more)

@JulianAllen13 3 роки тому

Does eTap use CANBUS system too? Would love to see a video showing how the much tidier eTap system works.

@einundsiebenziger5488 3 роки тому

Sram is using their own proprietary protocol, because the system wireless.

@sventice 3 роки тому

What is the weight difference between Di2 and a comparable mechanical groupset? Even small batteries tend to be pretty dense.

@alastairstanley 3 роки тому

I think GCN did a previous gram for gram comparison of mechanical vs Di2; seem to recall there was only a gram or so difference between mechanical Ultegra and Ultegra Di2.