Bicycle Mechanics - Bottom Bracket spindle sizing help

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malsr
03-11-10, 11:40 AM
I've got Campy Mirage crank arms and I need to determine the proper spindle length for a bottom bracket. From what I know, there is a specific spindle length for every type of crank arm. Anyone know where can I find this info on the net?

TejanoTrackie
03-11-10, 01:00 PM
Google and ye shall find the answer.
spaceboy
03-11-10, 07:11 PM
Here's the Sheldon Brown page:
http://www.sheldonbrown.com/chainline.html

I still don't really get it but maybe I just need to read it more attentively.

malsr
03-11-10, 07:41 PM
I read Sheldon's write up and I Googled.....and came up with 111mm. Could I use a 110mm spindle???? I read somewhere that sizing down a mm or so is ok. Thoughts, comments?
muckymucky
03-11-10, 08:25 PM
is sizing up a mm or so ok as well? i'm running 110 bb's on fc7600's that are pegged to be 109 instead.
hmmm~
carleton
03-11-10, 08:27 PM
Moving to mechanics from SSFG. Some really smart folks over there.
muckymucky
03-11-10, 08:34 PM
except this is the only subforum we read?
operator
03-11-10, 08:47 PM
I read Sheldon's write up and I Googled.....and came up with 111mm. Could I use a 110mm spindle???? I read somewhere that sizing down a mm or so is ok. Thoughts, comments?

Campy doesn't make a 110mm.


is sizing up a mm or so ok as well? i'm running 110 bb's on fc7600's that are pegged to be 109 instead.
hmmm~

Shimano doesn't make a 109 square taper. The 110mm shimano has the same chainline as the 107mm. So you're off by 1mm on each side. Assuming the proper 7600 bottom bracket (which is no longer available) is symmetrical.