I have filed down plenty of JIS forks to fit an ISO headset. It really isn't much work and pretty hard to mess up. If you buy a new headset then you will have the oposite problem of the cups not fitting properly in the head tube which could be worse if the press isn't tight enough.
I have filed down plenty of JIS forks to fit an ISO headset. It really isn't much work and pretty hard to mess up. If you buy a new headset then you will have the oposite problem of the cups not fitting properly in the head tube which could be worse if the press isn't tight enough.