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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  BB size?
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Author Topic: BB size?  (Read 594 times)

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Offline pickle

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BB size?
« on: January 18, 2010, 06:20 PM »
Right I've bought some threaded bar and washers but can someone tell the diameter of a US BB shell so I can be sure they're big enough?
 :daumenhoch:

Offline HUTCHMAN

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Re: BB size?
« Reply #1 on: January 18, 2010, 06:53 PM »
the o/d of a us BB shell is 56mm,so some where in that region should do

Offline stidds

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Re: BB size?
« Reply #2 on: January 18, 2010, 07:03 PM »
Just measured my Champions BB and external is 58mm, it is chromed so maybe a bit thicker than Hutchmans.

Offline pickle

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Re: BB size?
« Reply #3 on: January 18, 2010, 08:33 PM »
cheers guys  :daumenhoch:

my washers are big enough  :daumenhoch:

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