Framebuilders - replacing a steer tube

i recently had a LBS pull a headset off my fork & they screwed up the threading on the steer tube (really badly). they ended up having to grind it down a little in order to be able to thread the headset back on. so now my headset barely threads on with no spacers.

so i'm thinking of asking a frame builder to replacing the steer tube on my fork. i normally wouldn't really care so much, except for the fact that this is a very rare 3rensho frame worth a lot of money.

KFM, i've been thru the same thing. in my situ it was easier to get a new fork. lemme guess aero bladed sanrensho crown? unless it has engraving just look for another fork. to answer your question, yes it can be done, but finding the builder who has time and wants to take it on is the hard part. If you were out west here bernie mikkelsen would be your man. http://www.mikkelsenframes.com/

i recently had a LBS pull a headset off my fork & they screwed up the threading on the steer tube (really badly). they ended up having to grind it down a little in order to be able to thread the headset back on. so now my headset barely threads on with no spacers.

so i'm thinking of asking a frame builder to replacing the steer tube on my fork. i normally wouldn't really care so much, except for the fact that this is a very rare 3rensho frame worth a lot of money.

You can melt some brass into the damaged threads and re-cut them. Brass threads aren't quite as strong as steel threads, but they're better than no threads and cheaper than a new fork.

Have you looked for a headset with a lower stack height?

KFM, i've been thru the same thing. in my situ it was easier to get a new fork. lemme guess aero bladed sanrensho crown? http://www.mikkelsenframes.com/

yup.

i dont know if this will work on your fork, some NJS steer tubes are partially rifle butted. But I have heard a few big names mention a sleeve joint repair.

i dont know if this will work on your fork, some NJS steer tubes are partially rifle butted. But I have heard a few big names mention a sleeve joint repair.

Lots of steer tubes are rifle butted, started I suspect by Columbus with their SLX/TSX/SPX lines. Pretty silly use of metal but collectors are pretty anal about this kind of thing. And a sleeve joint repair is no way to try to appease a collector - fill the threads with brass as suggested and see how that works if you want the keep the fork original.

I'm under the impression that his steer tube is too short. not just missing some threads. Am I missing something?

I'm under the impression that his steer tube is too short. not just missing some threads. Am I missing something?

Went back and read the OP's first message again and I think you are right. Time for a new steerer unless a low stack height headset can be located. One other option is to shave down the top lug to reduce head tube height. Not the best solution for a collectible frame but it will give you a couple or three mm to play with.