Are rear hubs the same width? Are the MTB hubs the same width as road hubs or is the gap between the rear stays different from MTB to road?
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Rear hubs, are they all the same width?
(9 posts)-
Posted 11 years ago #
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MTB = 135mm
Road (modern) = 130mm
Road (old) = 120mm, 126mm, etc.That's all OLN (Over Locknut Dimension), rather than the width of the hub itself.
Posted 11 years ago # -
Ah so my cunning plan to build a rear wheel which I could use on a carbon frame and the Cotic CX is flawed as the XT rear disk hub will not fit in the gap, Shimano 105 it is.
Cheers,
Dave C
Posted 11 years ago # -
A lot of frames are now produced at 132.5mm and bend either way (I doubt this applies to carbon road frames however!)
What's the Cotic made of? If it's steel, there will be absolutely no issue just putting a 105 wheel on the back and bending the stays in with the QR. I've done this for years with a variety of bikes (for a while my white commuter was on 126mm with a 135mm spacing IIRC).
Grrr. We're still in house buying mode and all plans to buy toys are being drowned at birth. Jealous!
Posted 11 years ago # -
With steel, it can work the other way too: but only with 130/132.5mm rear stays. I popped a 135mm XT rear hub into the Mike Cowal frame, now has a 130mm hub instead which feels more natural. Rode perfectly fine on the 135mm though...
Posted 11 years ago # -
Dave, wasn't it bent into an eye-watering 119 when you had a Sturmey-Archer in there?
Posted 11 years ago # -
No, the S2C comes with spacers that make it up to the mid 120's. I think.
Considering you can stick a long bit of wood into steel frames and cold set them into completely different sizes, I don't worry that a few mm will cause famine and destruction. There are two stays, so 2.5mm on either size (stays are probably about 430mm long) = not very much deflection really?
Posted 11 years ago # -
Indeed, ,my sturmey archer 3 speed needed spacers to fit into the space vacated by the poor performing nexus 8
Posted 11 years ago # -
+1 to steely flexy, I hasten to add.
Black fruity's done time as a 120mm fixed and 130mm road hub, on 125mm dropouts, which is either my poor measuring or Raleigh up to its old tricks again and having its own in-house OLD.
If any dear readers use this thread for future reference, it's better to have your hub too wide, especially with single/fixed/hub transmission. It's more fiddly to get the wheel in, but once it's there it won't move about when you tighten the axle nuts or QR. This movement almost reduced me to tears when black fruity needed chain tensioning.
Posted 11 years ago #
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