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Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

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Old 03-12-14, 02:06 AM   #1
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replacement for odd BB

Hi all,

There's a guy on a local site trying to find a replacement BB for his "Gazelle Olympic Race" road bike.
Current BB looks like this:

And sits in a BB shell that's about 39 mm inner diameter. 68 mm width.

What's this version called, and where do you get a replacement?

Other options?

(I think) Ashtabula-to-cartridge won't work. Looks like the wrong diameter.
Ream the BB shell out to take a BB30 press fit?
Scavenge a thin walled BB shell from another steel frame and bond it in there?

Could it be something out of the BMX world?
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File Type: jpg odd bb.jpg (84.2 KB, 28 views)
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