Bike Forums - View Single Post - proper bottom bracket size

10-09-10 | 12:10 PM

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TimeTravel_0

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proper bottom bracket size

I have a cup & cone style bottom bracket that I would like to replace for a cartridge unit. I would like to use a Shimano square taper cartridge (UN54?). The crankset is an Sakae triple and the rear spacing is 135.

The bottom bracket shell width is 68mm. English/ISO threading.

The spindle on the old bottom bracket is marked as 3S (YST-3S, specifically). On the Sheldon Brown site, 3S has an over-all length of 121.5, but when I measure the spindle with my calipers, I get 125 on the dot.

http://www.sheldonbrown.com/bbsize.html

What width bottom bracket should I go with?

Last edited by TimeTravel_0; 10-09-10 at 07:04 PM.

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