You can pretty much use all of those suggested, but many here would take great umbrage at you mounting Campy or SRAM cranks on a Shimano bike. If you have BB30 or other standards that can use an adaptor, then the Cannondale cranks might be nice if the budget allows, along with some of the other aftermarket cranks (plenty of threads on those).
Other rings may indeed be stiff enough to resist the forces of DI2, though not as stiff as the DA rings. It sounds like you've decided that the non Shimano options are stiff enough for you, though.
Take it as you will.
I am converting to Red Exogram (keeping the CT2's). To avoid the combination of Shimano and Sram on the same build, I will sand them down, and keep them in nude carbon.
As said prior, there are lots of threads regarding these issues.
2014 Canyon Ultimate CF SLX Di2
I'm trying to sort through these to find the truth
- the da 7900 crankset is specifically designed due to the tremendous forces that the FD servo generates. Not many others can cope with the stress
- the spacing between the chainrings is unique to da and using other cranksets with a different gap will result in the auto trimming not working as intended
I am not worried with mixing and matching, i've never really loved the look of the stock da crankset. I also run a bike with campy sr which i really like the performance of and look of and if they worked I would definitely try them but I can not find anyone who has used this combination successfully.
I am interested to see what the alternatives are...
I have a hard time believing that motor puts more stress on the rings than a sprint would. I think that is just some marketing BS Shimano came up with to encourage people to buy Shimano cranks.
OP, personally, I don't like mixing Campy/Sram/Shimano, but I am very OCD - My closet is organized by type of clothing and color. But that doesn't mean you couldn't use FSA, Rotor or any of the lightweight options out there.
I us a compact Rotor with Rotor chainrings combined with di-2 on a Cervelo R5 and everything works fine and with zero problems so far (10k miles)
Back to the shifting, Di2 will work with any ring, but due to the power of the thing, it is best with Dura-Ace 7900 rings. The spacing of the rings is optimized for Shimano, as it is factory pre-set for sweep. Campagnolo ring spacing is very slightly different and I have never tried a Campagnolo crank on Di2. Most other cranks use Shimano ring spacing, so you should be good there.
Geoff wrote:The spacing of the rings is optimized for Shimano, as it is factory pre-set for sweep. Campagnolo ring spacing is very slightly different and I have never tried a Campagnolo crank on Di2. Most other cranks use Shimano ring spacing, so you should be good there.
Isn't this what the high and low trim setscrews are for on the FD? I assume you can use it with any spacing you want on any double chainring crank.
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