I use the 7900 crank and rear derailleur, rest 7800 parts. I do use the 7900 chain and new profile 6700 cassette, works perfectly. I'd try your existing setup with the new crank, you can always change out the chain which works fine with 6600/7800 cassettes.
1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
A forum community dedicated to Road Bike owners and enthusiasts. Come join the discussion about bike parts, components, deals, performance, modifications, classifieds, troubleshooting, maintenance, and more!