Bike Forums - View Single Post - Bottom bracket, wrong thread?

08-05-19 | 01:47 PM

#20

rando_couche

Senior Member

Joined: Jul 2013

Posts: 1,439

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Quote:

Originally Posted by CliffordK

French and English bottom bracket threads are mighty close.

English/ISO: 1.370" X 24 tpi or 1.375" X 24 tpi
French: 35 mm X 1mm (25.4 tpi)

Your measuring indicates you probably have FRENCH.

If the fixed cup is LH, that is SWISS thread.

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