Want discs in my XC...
 

[Closed] Want discs in my XC bike, fork and wheel optiosn please

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Fed up with canti's, the judder, the fast wearing through rims, the crap braking in mud etc.

I have a planet X uncle jack and have the forks that match the bike. What options Do I have for forks that will fiT the geometry of this bike but have disc mounts on them?

Also what are my options with wheels? I presume mtb hubs built onto road rims will be the wrong diameter and not fit in the drop outs?

All help and advice greatly appreciated.

Cheers

Dave


 
Posted : 19/08/2010 9:01 am
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Various forks including kinesis alloy (£60 or so?) and carbon (£130).

Brakes - avids, hub - any qr disc front hub (lx £10 @ on one just now)


 
Posted : 19/08/2010 9:04 am
 tron
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MTB hubs and road rims will work fine.

On-one are doing Pompetamine forks with disc tabs for £40...


 
Posted : 19/08/2010 9:10 am
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what about the rear hub? spacings? will a mtb fit?


 
Posted : 19/08/2010 9:12 am
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nice one tron- will have a look


 
Posted : 19/08/2010 9:13 am
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mtb rear hub is 5mm wider, you should be able to get one re-spaced.


 
Posted : 19/08/2010 9:18 am
 tron
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I assume you're talking about an Uncle John frame? I don't think they have disc mounts at the back. According to Sheldon Brown, Mountain bike hubs are 135mm, road hubs are 130. You'd probably squeeze one in, but it's not a brilliant idea - I think they're Alloy frames?


 
Posted : 19/08/2010 9:21 am
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Tron - it has mounts for discs at the rear, that is why i am looking for a fork at the fornt with the disc mount on it.

So if the buh is 5mm shorter, i don't really fancy squeezying the QR to make them fit. Are there any 130mm hubs out there with disc mounts on them?


 
Posted : 19/08/2010 9:27 am
 tron
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If it has disc mounts, then I'd suspect that it's MTB spaced - measure it!

Another option would be to see if some bits (ie, spacers, lock nuts) can be removed from a rear MTB hub to alter the spacing without trying to cold set the frame.


 
Posted : 19/08/2010 9:29 am
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Oops I just realised you won't be able to change teh spacing on teh hub as it would move the disc relative to the frame (well you could but it's a bit of a bodge).


 
Posted : 19/08/2010 9:31 am
 tron
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You could change the spacing on the hub, but you'd have to do it all on the driveside, not the brakeside.

A lot of frames are spaced at 132.5, allowing you to run either road or mountain hubs. I reckon that means 2.5mm of stretch is reasonably sane, so if you can knock 2.5mm off the hub, you should get away with a Mountain hub in a 130 frame.

It's all a bit academic without knowing what the frame spacing is...


 
Posted : 19/08/2010 9:35 am