TPI on a Schwinn StingRay/Lil' Chik crank?

[Dr. Tankenstein]

Like the title says, what's the TPI (threads per inch) on a standard Schwinn crank? I just bought a 1967 crank and thought the set off a 'new' Schwinn bike would work, apparently, NOT! Is it 28?

Cheers!
Dr. T

 

[CCR]

Schwinns and some BMX stuff is 28tpi, most others are 24 tpi

 

[Dr. Tankenstein]

Yep, it looks like the 'new' crank definitely has fewer threads. Darn! This project is nickle and diming me to death! :? Or divorce, whatever happens first! :roll:

Thanks for the confirmation.....

Cheers,
Dr. T

 

[CCR]

the bearings are usually different too 9 bearing cage w/28tpi vs 10 bearing cage w/24tpi. mix em up and you end up mashing a cage up sometimes wondering why it feels loose.

 

[Dr. Tankenstein]

Thanks, I'm gonna start searching for an entire BB set, just to prevent further 'DOH!s'

Cheers,
Dr. T