Shimano 105 5800 and Ultegra Di2 mix?


New Member

I have a bike with full 105 22 speed and was wondering if I could just get Ultegra Di2 shifters, front and rear mech and associated cabling, and use with existing 105 chainset, chain and cassette?
Yes you can.
Is the frame DI2 specific? I only ask as my Wilier GT is DI2 and my friend has the same frame (although it is not DI2 specific). He got a DI2 groupset, but we had to mount it externally as it does not have the hole required for all the internal cables. The hub for the bottom bracket is solid as well, wheras my DI2 specific frame allows everything to be internal. Its not a problem as Shimano do offer parts to mount it externally and it looks very neat now that he has all the right bits.
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