The shape of things to come....

Thanks for the offer. The problem is it seems an odd ball size on the old Calton cobra I am fettling. The thread on the steerer is not 24 tpi . I have ran up a old lock nut from my junk box . No idea what it cam off. Maybe it's 26 tpi all very frustrating. I dropped a pm to spokesman to see if he knew ,and he had similar
If midlife, (Shaun) reads this he may know?

As usual, Sheldon has the answer...

https://www.sheldonbrown.com/cribsheet-headsets.html

26tpi is an East German or Raleigh standard. Being a Carlton, I'd go with Raleigh, which is basically JIS except for the threads.

Bloody kids in shops these days would think "Sheldon Brown" is a "colour way" for the new season of bikes made by Santa Cruz.
 

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