campy rear hub axle fixing nut, need shorter one, available?
06-11-08, 10:12 PM
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campy rear hub axle fixing nut, need shorter one, available?
I have a campy rear hub of 130mm. I took out a spacer about 1mm on the drive side, and
another 1.5mm spacer on the non-drive side. My goal is to make it 126mm. So I am a little short.
The fixing nut on the non-drive side is about 5mm thick. I wonder if there is a thinner one, at least
1.5mm thinner (if it is thinner, I can just make up the difference with a spacer.
I do need to redish it afterwards. I hope I don't need to replace the spokes.
The thread size is weired, I tried to fit the fixing nut in home depot, no luck at all.
What kind of threading is it? branfordbike.com doesn't have the threading info. It is a late 90s campy 9 speed hub.
Alternately, do you have any other ideas to make it 126mm? If all else fail, can a custom wheel be built with 126mm hub space but using campy 9-speed hub?
thanks.
another 1.5mm spacer on the non-drive side. My goal is to make it 126mm. So I am a little short.
The fixing nut on the non-drive side is about 5mm thick. I wonder if there is a thinner one, at least
1.5mm thinner (if it is thinner, I can just make up the difference with a spacer.
I do need to redish it afterwards. I hope I don't need to replace the spokes.
The thread size is weired, I tried to fit the fixing nut in home depot, no luck at all.
What kind of threading is it? branfordbike.com doesn't have the threading info. It is a late 90s campy 9 speed hub.
Alternately, do you have any other ideas to make it 126mm? If all else fail, can a custom wheel be built with 126mm hub space but using campy 9-speed hub?
thanks.
Last edited by skinnyboy; 06-11-08 at 10:18 PM.
06-12-08, 01:48 AM
#2
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You are going to have a tremendous amount of dish on that wheel.
I have no idea if there are thinner replacement locknuts available. Is the axle thread the standard Campag 10 x 26 tpi? Perhaps a Tipo locknut will do the job, if so. good luck finding one.
I have no idea if there are thinner replacement locknuts available. Is the axle thread the standard Campag 10 x 26 tpi? Perhaps a Tipo locknut will do the job, if so. good luck finding one.
06-12-08, 07:14 AM
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Where to find a Tipo locknut?
How come the dishing would be large? because of the asymetric (1mm drive side & 3mm non-drive side) thickness I could remove? but that would just be 1mm dished to the drive side. If the spacing was
symetric (2mm on each side), that would be okay then?
I could not remove more than 1mm on the drive side, because the axle threading would stick out of the locknut, and wouldn't fit into the dropout.
06-12-08, 08:29 AM
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A couple of potential problems:
1. If you remove too many spacers from the drive side, the chain may hit the dropout in the smallest cog. For that matter, the cog itself may hit.
2. You will have to shorten the axle to keep the protruding ends from sticking out beyond the dropout faces which will prevent the qr skewer from clamping it properly. A 130 mm hub uses a 141 mm axle and a 126 mm hub uses a 137 mm axle.
3. You may be doing a lot of work for nothing. Most 126 mm frames will accept a 130 mm hub without too much fuss. It will be snug but doable. In line with that, don't agonize over getting the hub to measure exactly 126 mm. A mm or so wider will be no problem.
4. Using a 9-speed freehub on a 126 mm spaced hub will increase the dish beyond the normal amount. The 9-speed freehub bodies are wider than the 7-speed (or 8-speed Campy) bodies so the rim has to be dished more to compensate.
1. If you remove too many spacers from the drive side, the chain may hit the dropout in the smallest cog. For that matter, the cog itself may hit.
2. You will have to shorten the axle to keep the protruding ends from sticking out beyond the dropout faces which will prevent the qr skewer from clamping it properly. A 130 mm hub uses a 141 mm axle and a 126 mm hub uses a 137 mm axle.
3. You may be doing a lot of work for nothing. Most 126 mm frames will accept a 130 mm hub without too much fuss. It will be snug but doable. In line with that, don't agonize over getting the hub to measure exactly 126 mm. A mm or so wider will be no problem.
4. Using a 9-speed freehub on a 126 mm spaced hub will increase the dish beyond the normal amount. The 9-speed freehub bodies are wider than the 7-speed (or 8-speed Campy) bodies so the rim has to be dished more to compensate.
06-13-08, 08:05 AM
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During redish, what is consider too much? > 2mm? From eyeballing, seems like the rear wheel needs to
move 1-2mm towards the driveside.
move 1-2mm towards the driveside.
