Originally Posted by
Eric F
Forget gear inches (which is stupid anyway). This is simple math.
48 / 34 = 1.412
1.412 x 25 = 35.29
A 35T ring will get you closest, but I don't think I've ever seen a 35. A 36T ring will give you a bit larger low gear. A 34T ring will give you a bit lower low gear.
My arbitrary gear comparison scale is better than your arbitrary gear comparison scale!
Centimeters are stupid! I only use millimeters!