What headset do I need?

[Tootyred]

Or find a headset lock ring to use as a spacer...or as a last ditch if 38 is too tall...cut 2mm off the threads.

 

[sefton1275gt]

Thanks for all your help.

(I forgot about the cantilever brakes, so I need to also account for a hanger)?

 

[Tootyred]

I wouldn't recommend putting a hanger into a headset. It puts all the wrong forces on all the wrong threads. Either get a stem with a hanger built in, or put a hanger on the quill above the headset.

Only my opinion, but.....

 

[bikeworkshop]

It puts all the wrong forces on all the wrong threads.

Fact, not opinion.