Thanks so much for the comment! So glad it helped you out!! I wish you great luck in the race!! Dave

Mark, thanks for watching my channel and leaving a nice comment! More videos to come! Dave

Awesome! Thanks for the comment! How do you like Full Synchro? I just started using it more and I have to say I think I am a fan! Dave

Thank you for watching the video and leaving a comment! I really appreciate it! Dave

Phil, thank you for the comment, very much appreciated! Dave

Glad it was helpful! Thanks for watching and leaving a comment! Lately, I have been putting my bike into Full- Synchro mode. I never thought I would say it, but I really like having the Shimano DI2 take over for me! Dave

@@davescycling please share any inputs good and bad or any difference from shifting between the Semi-Synchro and Full-Synchro. Currently, I'm using Semi-Synchro on my bike.

With Semi-synchro, anytime you shift the front derailleur from the big ring to the small ring or vice versa, the Shimano DI2 automatically adjusts the rear derailleur to compensate for the large jump in gear ratio. With full Synchro, all you need to do is shift the rear derailer up or down as needed and the DI2 will adjust the front and rear derailer’s to make sure it gets you to the next available gear ratio. It does take a little getting used to because when it is shifting automatically in the front and the rear, it feels kind of weird but once you get used to it, it’s not bad at all. I just find it nice especially when I’m tired to only need to hit one button to get to the next gear and not have to worry about the combination of front and rear. It’s kind of like the difference between an automobile, manual and automatic transmission . Once you let the automatic transmission take over, you just get used to some of the quirks when it shifts lol. Also, with full Synchro, you can still always instantly override it, and put it in whatever gear you want. Dave

Glad it was helpful! And thank you for leaving a comment! Dave

My understanding is that initial compensation is to keep your cadence the same. After that compensation is done when you start shifting again like needing easier gearing in the rear for a steeper climb then that compensation starts again, as needed, depending on what is needed. That can all be confusing and/or not doing what you really want so I use manual mode and shift when I want to.

Thanks a lot for watching the video and leaving a comment, I really appreciate it! Dave

Thanks for watching and leaving a comment! I love to hear that my videos helped! Dave

Thank you so much for that comment! I’m so happy I could help because I know there isn’t a lot of info out there! Enjoy the DI2, I think it’s awesome!! Dave

Thanks for sharing! At first, I agreed with you, and wanted to maintain full control by keeping it in manual mode. But I decided to try the other modes for a while, and I am now loving the full Synchro mode! I love that I only need to press one button to move up or down the gear ratios but when I get to a traffic light, I can still override it manually and put the front derailer to the small chain ring. Thanks for watching the video and leaving a comment. I really appreciate it! Dave

@@davescycling Good to know your experience, might be I try later those modes. Thanks !

Thanks so much!!!

Try si.shimano.com/en/manual/search?q=grx,di2 Dave

Chan, thanks for watching the video. If what you say is happening in "Full Synchro" mode, sounds like maybe yours needs to be configured or software updated. If you connect it to a computer and use the e-Tube application, (or use the phone app if you have the wireless option) it will allow you to choose the compensation from 0-2 gears I believe. Also, the 10 or 11 speed Di2 only needs the battery charged as it is all connected by wires. If you have the latest 12 speed Di2 (I do not have this), I believe you will need to charge each derailler as my understanding is that it is truly wireless. Dave

@@davescycling Dave, thanks for the detail reply. I have 11 speed so I guess I only need to charge the Shimano E-Tube Junction (SM-EW90-A). Do you have video showing how to update software?

Chan, I do not, but I will try to put one together tonight or tomorrow at least with the basics. No promises but I have been meaning to do it anyway! I will let you know when it is up. Dave

@@davescycling Dave, I just found out I have SM BTR2 battery which is not available for synchronization. Do you know the work around?

Chan, go to: bettershifting.com/di2-synchronized-shifting-the-complete-guide this will help answer your questions. Dave

Thanks so much for watching the video and asking your question! Basically it is just to give you some options as to how your bike shifts. I will say that at first I was all about staying in manual mode to make sure that I had total control over the shifting. After a while, I decided to try the other shift modes and lo and behold, I am now a big fan of full Synchro Mode! What I love is that I only need to press one lever to shift up and one lever to shift down. In full synchro mode, you still have total control to override, so, for example when I come to a stop or a traffic light I simply shift my front derailer to the small chain ring so I can start off any lower gear. I hope this helps answer your question. Dave

@davescycling gothca, thanks! So basically just makes it easier to cruise and have full function of the gear range without having to actuate individually all the gear range. For contrast, I enjoy shifting through all the gears when riding, over the varying terrain dynamics. Others may just prefer to pedal only and have the bike do most of the "work."

@@gibzen9617 Another example: I've two SW 9150 switches on the bar itself, between STI and stem ("tops"). On longer distance rides, I can still shift remaining on the tops.

Robert, thanks for watching the video and leaving a comment! Alternating red and green flashing lights after holding the DI2 junction box button down indicates it is in Bluetooth pairing mode. Dave

Thanks for watching the video and asking a question! I was a “Manual shifting” guy until I recently decided to experiment with the different modes. I am kind of warming up to Full-Synchro because where I ride is nonstop up and down hills and it is nice not to have to think about shifting other than “up or down“. I also love that I can change modes at any time while riding! Dave

Are you sure you have the wireless unit? It was an option until the latest 12 speed Di2. I had to install the wireless module on my new bike. Dave

Yes, you do have to get used to it! For quite some time I didn’t want any part of that, but I finally started using it and I’ve grown to like it.

A gear hub is a different story! I do not know about them, but I am pretty sure they do not have multiple shift modes. Thanks so much for your question! Dave.

I love my frame bag!! I know it takes away from the bike, but I like to carry food, a few tools and have a spot to stow extra clothing when needed. Thanks for watching the video and I do appreciate the comment! Dave

@@davescycling LOL I'm just kidding. To each his own. You got space there to carry a laptop. 🤣 Thanks again for the video

A laptop and a table to put it on, lol!! Enjoy your bike!! Dave