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No, 105 Di2 is not compatible with any of the 11-speed GRX Di2 (electronic) parts. Sorry.
JWB475 wrote: Only the front and rear derailleurs need to be from the same grouping, meaning GRX/Road FD will only work with a GRX/Road RD. You can't use an XT/XTR RD with GRX FD. If you want to run 1x, I believe you…
Yes - you can indeed use Ultegra on the front and GRX on the rear. There are a couple of other things worth mentioning: The GRX Chain line is 2.5mm more outboard than normal road chain line. The GRX FD therefore also…
hmm, good question regarding the wire.. An inline junction exists (EW-JC200), but in my opinion it is still too 'bulky' to fit under the bar tape. Personally I would just plug in / unplug the electric wire at the…
Jimbop wrote: I'm pondering whether to treat myself to Di2 and have a mix of Di2 components in mind. I have a few questions if anyone happens to know the answers. 1) GRX RX815 Di2 shifters. I think you can have remote…