Bike Forums - View Single Post - Change from 50 to 48 or 46?

03-21-11 | 02:19 PM

#11

Drew Eckhardt

Senior Member

Joined: Apr 2010

Posts: 6,341

Likes: 326

From: Mountain View, CA USA and Golden, CO USA

Bikes: 97 Litespeed, 50-39-30x13-26 10 cogs, Campagnolo Ultrashift, retroreflective rims on SON28/PowerTap hubs

Quote:

Originally Posted by heirfaus

Hi everyone,
Today my question is about chainring selection. I just put on a FSA Energy compact with a 50/34 (shimano 9 in the rear). I've noticed now after about 30 miles of commuting I am not using my smaller cogs in the rear. On my small chainring I use the first 5 when taking off and then shift to the large chainring because the chain rubs on the large chain ring if I try to use 34/15(6th rear gear) combination.

Some FSA "9 and 10 speed compatible" cranks have an unusually small distance between the rings.

I spaced mine back to Campagnolo 9 speed dimensions using thin spacers made for the purpose by Wheels Manufacturing and Le Tour so that I'd have one overlapping gear between rings instead of noise or a hole between them.

Branford Bike sells the .6mm spacers.

Last edited by Drew Eckhardt; 03-21-11 at 03:33 PM.

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