think i read knackered uses 15/42 gearing on his SM, what are others using?
I want to get as near a damn right first ttime as possible as im a tightarse and dont want to buy loads of sprockets

You are correct.

Im on 14/42 but ive said before 1st gear is almost none existant. Top end is fine.

I dont understand gear ratios, if i put a 15 up front will 1st gear last longer? Or do i need a 13?

twistednuts wrote:Im on 14/42 but ive said before 1st gear is almost none existant. Top end is fine.

I dont understand gear ratios, if i put a 15 up front will 1st gear last longer? Or do i need a 13?

it will last longer a 13 will be worse than your 14

Good stuff, cheers for that. I'll order one pronto