Bike Forums - View Single Post - Decipheriing Bottom Bracket Size Code

09-05-09 | 08:52 AM

#3

HillRider

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Joined: Aug 2005

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From: Pittsburgh, PA

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

I can help with some:

68 means it's for a 68 mm wide bottom bracket shell which is the standard English road frame width and also on some MTB frames

The 121.5 is the end-to-end width of the spindle in mm.

Japan is obviously the country of manufacture. IIRC, VIA means "patented" but I'm not certain of that.

CrMo means Chrome-Moly and is the alloy steel the spindle is constructed from.

The D-3SS specifies an unsymetrical (the drive side of the spindle is longer) spindle in the length and bb shell width shown above.

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