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can i use a threaded headset on a threaded steerer tube?(4 posts)

can i use a threaded headset on a threaded steerer tube?esbike
Jun 16, 2001 4:25 PM
A question for a wrench-type willing to help: I bought a rock shox metro fork for a commuter bike I'm building from a old road frame. They were supposed to send me a threadless fork but it has threads! The steerer tube fits fine in the threadless headset I bought and the threads stick way above the cup and bearings. Can I still use this fork? I'm not really interested in perfection, I just want this commuter to work. I think the only part that would touch the threads would be the threadless stem, which I imagine would get a little scored from contact with the threads. Any thoughts are much appreciated...
Jun 16, 2001 5:12 PM
cut threads are stress risers waiting for something to tell them to break. If only a couple of threads were in the clampon stem, I'd say sure go for it. If the entire length of the steerer inside the clampon stem is threaded, I'd say, DANGER. If you persist in doing it anyway, try this: Cut a 5-inch length of broomstick, whittle it so it's a real tight fit inside the steerer, and pound the sucker down in so if the threads break, the stem won't come off without some warning. Oldtimey Tour riders used to pound broomsticks in from the fork crown so if their steerer broke, they wouldn't become paralyzed.
Uh, have you considered just using a threaded headset and a quill stem? That's what I'd do, lots cheaper than a wheelchair, and even if the threads never fail, at least you'll have peace of mind when you're riding. I wouldn't want to be constantly worried my front end was a potential accident waiting to happen.
Jun 16, 2001 6:30 PM
thanks for the reply. I guess you are right. I will just have to switch to threaded. I had all the parts to put a threadless on, so it is annoying to have to return those and go to threaded, but I suppose that is much better than an accident.

I think also, I'm going to have to have the steerer tube cut and threaded further along the shaft because the threads are positioned way above where the headset would be.
Jun 16, 2001 8:28 PM
Wait a minute--you say the threads are way above where the headset would be? Maybe your stem would clamp below the threads too....and you'd have essentially an unthreaded steerer tube anyway.