I have a commuter bike using a 3x9 MTB transmission:
- HG61 9 speed 11-32T: 11 / 12 / 14 / 16 / 18 / 21 / 24 / 28 / 32
- Deore XT crankset (104MM) 22 / 32 / 44.
I mostly use the 32-tooth middle chainring with either 12 / 14 / 16 / 18 sprockets. Fairly flat commute around London.
It's time to replace the parts and I would like to change the ratio so that I am not always on the low gears. I see two options:
Replacing the 32 chainring by a 32. I found one on amazon for 8 gbp and going for for a 11-28T cassette to add a low sprocket (11 / 12 / 13 / 14 / 16 ...)
Keeping a 11-32 cassette but going for higher chainring so my chain is well in the middle of the cassette in the future. Probably a 34T but I don't find them, mostly 36T but I'm worried this will be too much?
Appreciate any pointers so I don't guess this wrong re: gearing or chain length or anything else I don't know yet.