Author Topic: bottom bracket bearing code (Read 558 times)

gib66 · « **on:** March 31, 2013, 09:41 AM »

does anyone have a set of 20mm bottom brackets.i need the bearing code for it so i can order some new nearings .they need to be for a usa bb set

TwoBobRob · « **Reply #1 on:** April 08, 2013, 10:36 PM »

Have you not got a mid or U.S. bb knocking about? Quick measure up and you're there.

A normal mid/U.S. bearing is an R12 2RS. This is imperial, the internal diameter is actually 3/4" or 19.05mm. You could bowl into your bearing house and ask for the metric equivalent of an R12 with a 20mm ID I suppose.

They might look at you a bit funny....