Thread: Ext. BB: 68mm to 73mm BB Question
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Old 03-29-26 | 12:51 PM
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oldbobcat
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From: Boulder County, CO

Bikes: '80 Masi Gran Criterium, '12 Trek Madone, early '60s Frejus track

73-68=5. You need 5 mm of spacer. If you put them on the non--drive side, they will bind on the non-machined surface of the spindle, but if you put them on the drive side, they might give you a chainline problem. Fool around.and find out.
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