9mm to 10mm front axle conversion?

jimmyhackers

10 kW
Joined
May 11, 2015
Messages
609
a while ago i went to disc breaks which envolved swapping/relacing my rim onto a front disc hub.

i didnt think to check axle width before i relaced it, and now i have a 9mm axle sitting in a 10mm dropout.

its been fine for the past few months and is still ok, but it is kinda bugging me.

its a solid axle with cup n ball bearings, and i wondered if/how easy it'd be to upsize the axle to 10mm?
 
Depends on the hub design. If it's cup-and-cone, and the cups are part of the hub, the hole in them may not be large enough for a bigger axle. As long as the cups are shaped such that the larger cones from the larger axle still let the bearings ride where they need to, and the hole is large enough to clear the entire larger axle, it may work ok.

If the hub used cartridge bearings, you'd just swap them out for ones with an ID that fits the new axle size.


It might be simpler just to get a bushing (tube) to put over the axle that has a 9mm ID and 10mm OD, and is just long enough to be the same as the width of the actual dropouts.


jimmyhackers said:
a while ago i went to disc breaks which envolved swapping/relacing my rim onto a front disc hub.

i didnt think to check axle width before i relaced it, and now i have a 9mm axle sitting in a 10mm dropout.

its a solid axle with cup n ball bearings, and i wondered if/how easy it'd be to upsize the axle to 10mm?
 
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