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Old 05-09-21, 08:44 AM
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dfrench52 
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Join Date: Jun 2009
Location: Too far from the beach in Wake County, NC
Posts: 31

Bikes: Nishiki Medalist

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Size of replacement BB bearings

My bike (Nishiki Medalist) has developed an intermittent knocking that seems to originate in the bottom bracket. The sound is more pronounced at times, sometimes inaudible, always follows my pedal stroke, sometimes under seemingly light load.

Anyway...after rechecking the usual suspects such as loose chainrings, pedals or spindle endplay, I repacked the caged bearings. None of this made any difference.

The bearing races look good, the cups look good, maybe a small dark spot on the fixed cup. Since the bearings seem to be original, I thought I'd replace them with loose ball bearings. Can anyone here tell me what size bearings to buy? There are currently nine bearings per side.

Thanks!
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