Originally Posted by
louison
I have a Peugeot Competition 5000 from '98 or thereabouts and the threaded fork (stem and handlebar in reality) is giving me a headache, but it's got me thinking about bikes from that era. The Peugeot is fairly low-end but a good chunk of higher-endish bikes seem to have made use of 1" threadless forks... so could I save myself from a migraine by getting a 1" threadless headset and fork ? I've even seen people keep the threaded fork and add a 1"->1"1/8 shim but I'm not sure how safe that is ? I may have confused myself with the inch talk as I'm european but I hope I conveyed properly what my goal is
I'm sorry - I completely misread your post. No, it isn't safe to use shims to clamp to threads. The threads will break off.
Some people are concerned about using shims in general, and that was what I was answering.
It is also acceptable to take a tall threaded fork and cut off the threads off to make a threadless fork out of it for a small frame.
Generally speaking, there is normally not enough steerer sticking up on a threaded fork to clamp a stem around it. Which is why I didn't realize that was what you are asking about. Also, the threads will fit loosely in the threadless headset..