Originally Posted by
schleven
I already have them. I found them on a junkyard bike in mint condition, therefore they are FREEEEEEEE.
He lives in SF, so it's pretty hilly. He rides a regular 10 speed but usually only stays in his lowest gear.
I only plan on running the 48...that would be the best idea right? 54 would be too big, yeah?
i agree that the inner 48 makes more sense.
aside from having a better set of realistic cog tooth options, you're less likely to run into chainline issues by using the inner, so you're off to a good start.
as for the gearing, i'd keep it small but i don't live in san fran so i can't say what cog would work best. i run 47 x 16 and do ok on steeper hills, but i don't deal with them on a daily basis by any means. perhaps an 18 would be a good place to start? How strong of a rider is he?