It should as the overall tire diameter has theoretically changed by 10% x 120 x 2 = 24 mm (1″). You will travel ~ 3″ further on a single rotation of the wheel. This all assumed the tire brand and model is identical.
Yes, the tire is now taller…90% of 120 instead of 80% of 120. It will change effective ratio and will feel like you went from a 42 to 41 tooth rear sprocket…less than 3%…likely hard to detect.
it does affect the gearing ratio but it’s not a huge change..install a 13 front tooth to go with your 42 rear sprocket and go with the 90 tire..that’s what I run and it’s great
Answers ( 6 )
Yes, but probably not enough that I would worry about it.
It should as the overall tire diameter has theoretically changed by 10% x 120 x 2 = 24 mm (1″). You will travel ~ 3″ further on a single rotation of the wheel. This all assumed the tire brand and model is identical.
Yes, the tire is now taller…90% of 120 instead of 80% of 120. It will change effective ratio and will feel like you went from a 42 to 41 tooth rear sprocket…less than 3%…likely hard to detect.
Thanks-may go back with 80:18 ??
it does affect the gearing ratio but it’s not a huge change..install a 13 front tooth to go with your 42 rear sprocket and go with the 90 tire..that’s what I run and it’s great
Yes but ever so slightly. You will not feel it. I don’t.