I have always been building with screw on freewheels or fixed but I have a bike with a cassette that I have been using.
The cassette is a 7 speed Shimano (28T biggest cog), 135mm rear spacing, 1 x7 setup. Hub is Shimano FH-RM30
I would like a wider range of gears, like 34 or 36T max cog cassette. There are very few 7 speed cassettes available.
Couple of questions:
Can I fit an 8 or 9 speed cassette on this body? Thinking on body/cassette width and UG/HG.
Would I need a spacer behind the cassette?
I guess I can use a 9 speed rear mech, is this correct? It's just that they are not much more expensive and they look nicer than 8 speed ones.
Any help appreciated.