ive been reading a lot about gear inches and have one question about it
a 70 gear inch....is it the same feel with a 40x15 as a 48x18?
like would acceleration be the same with the two since it is roughly the same gear inch?
Gear inches are gear inches. If you're riding brakeless, you should be more concerned about skid patches:
44/16 simplifies to 11/4, so there would be 4 skid patches.
45/15 simplifies to 3/1 so there would only be 1 skid patch.
42/15 simplifies to 14/5, so there would be 5 skid patches.
43/15 can't be further simplified, so there would be 15 skid patches.
Special thanks to Sheldon "Get a front brake" Brown
Look at gear inches as a piece of string. An 18 inch piece and six in piece are two feet, same as two 12 inch pieces. Doesn't matter what chainring and cog you use to get the gear inches - any combination that results in the same inches will feel the same.
Skid patches matter - the more you have, the longer your tire will last. But using a brake is a much better idea.
ok i understand gear inches..i did some more reading.
as for skid patches from what i got is that there is 3 spots (since ill be going with a 48x18) where you could stop the pedals to skid. that close?
either way i will be using a brake, i just feel like i want to understand this