i'mI'm building a new touring bike and finding the capacity specs far below what i'veI've used on the old one iI put together. the The crank is 44-20 and the cassette is 36-11, which is a 49 capacity. it It works perfectly with old friction shifters, and an extra long derailleur screw. and yes, this low gearing really has been useful/necessary with a loaded bike in the mountains.