Originally Posted by
princo
I have a frame being replaced with a 2020 Domane and I'm considering a sub-compact crankset. I noticed a supercompact adapter on FSA's website. (shop.fullspeedahead.com/en/type/front-derailleurs/accessories//supercompact-adapter). Looks like it works by extending the braze-on slot a little bit lower.
Any reason to think that it would not work with a Domane and/or other brands subcompact cranksets to lower a Shimano front derailleur?
I lengthened the slot on the frame, a bit lower. Those dimensions are standardized so regardless of chainring or crank brand, a given tooth count will require a specific height. So a 46T outer like I have will always require lowering that slot on the frame's braze on mount by the same amount. HTH