Originally Posted by
jpsawyer
So, I would never dare to put a threadless headset and stem on a frame with a threaded fork, but in an impulsive buy i purchased a kazane track bike with a buncha good components for $200, but after inspecting the pictures of the bike more closely, the fork seems to be threaded, but it had a threadless headset on the frame. (the stem was not included in the purchase) Now that I know it is actually threaded, i want to put on a threaded headset and quill stem. But I was wondering if by clamping a threadless stem to a threaded fork would have possibly damaged the threads on the fork. I am pretty sure the aluminum stem would give first, but i have never done this before or seen this done so I am not sure. I really hope the threads are okay though as if they are that means i would have to buy a new fork or continue running that mismatched set up. thanks!
clamping a threadless stem onto threaded fork is dangerous if the stem is clamping onto threads.
possible to have steerer break off at threads just under clamped stem since they act as stress risers.
If the fork is not original, and the threaded portion is high enough that it can be completely sawed off, the reamaiing steerer can be used threadless, but this doesnt sound like your situation.
get a propor threaded headset installed.
possible kludge solution is a frankenheadset:
use the threadless cups and upper race, then use 2 threaded headset lockrings to pretension bearings in place of a threadless stem and top cap
then use a quill stem on top
again tho, due to threads being stress riser; make sure the quill is deeply set inside the steerer to a level below the headset upper race -saw off excess threads if needed