Bike Forums - View Single Post - Campy BB fixed cup damaged threads

07-07-22 | 05:42 PM

#38

Road Fan

Senior Member

Joined: Apr 2005

Posts: 17,197

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From: Ann Arbor, MI

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Quote:

Originally Posted by JackJohn

Thanks for these details guys! Next investments: a pick and a thread file! Can a 1mm (25.4tpi) file also be used on a 24 tpi (1.06mm) or the pitch must be exactly the same?

FYI on that Italian lockring mentioned above I still haven’t come to a conclusion: it eventually ended up tightening on its cup but doesn’t work anywhere else. Another lockring that tightens everywhere is now a bit looser on this cup. I wonder if a lockring can be harder than a cup at the point of damaging it…
ps: very practical the reading glasses, one of the benefits of aging

No, you have to have a file with the right pitch for each bolt. McMaster-Carr sold (may still sell) a set of two combination files, one with an assortment of metric sizes and one with an assortment of English sizes. What I did not find is 26 tpi, the obsolete Raleigh thread pitch.

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