Wanted 1” threaded fork for 1990 Explosif

[frizzman4]

Hey, I’m searching for a p2, track 2 or other period correct rigid fork for my 1990 kona Explosif project. I live in the state, any help would be greatly appreciated.

Thanks!

 

[Splatter Paint]

FYI the 1989 and 1990 models use a different 1” steerer. One is JIS, the other is ISO.

 

[frizzman4]

What’s the difference? Can I use a Tange switchblade?

 

[Splatter Paint]

The bearing race dimensions are different. See: https://velo-orange.com/pages/threaded-headset-basics

If yours is a 1990 model (black paint, no u-brake) you should I think need a 26.4mm ISO fitment fork.

The 1989 green frames use JIS, well, mine did!