I just got a new 2016 Trek Top Fuel 9.9. It’s a huge upgrade from my 2013 Epic. The problem is going to from a 2×10 with lots of climbing ability to a 1×11 without that range. The cassette is a Shimano XTR with a 11-40 tooth range. The 40 tooth isn’t enough for this old fat guy to climb. Anyone know how hard it is to swap it out for one with at least a 42-44 tooth creeper gear?
Shimano makes a 46 tooth cassette. You will need to lengthen your chain. Smaller chain ring would work . You may need to shorten chain. Smaller chain ring will have more impact on suspension . A touch more kickback and anti-squat.
My favorite 11 speed cassette for converting 2/3x to 1x is e*thirteen’s TRS cassette. It has cogs from 9 to 46 (511% range), so you can run a smaller chain ring, maintaining some ground clearance. But I think it’s still only available as an XD.