Confusing myself: 10mm rear QR axle converter?

moonlite · Jul 6, 2025

I've rather rashly ordered a 26" Mavic Crossride rear wheel which has a 10 x 135mm rear hub. Online research, including of Mavic's own tech specs, is confusing as to what kind of adaptor (if any?) is needed to use this on an MTB which takes a 9mm QR skewer. Surely you'd need to lose 1mm from the skewer diameter for it to fit?

Here's a pic from Mavic's website, showing what looks like a fatter axle.

Has anyone got hands-on experience of this issue? Or am I just fretting about a non-issue?

highlandsflyer · Jul 6, 2025

It's a standard rear q/r.

moonlite · Jul 6, 2025

highlandsflyer said:
It's a standard rear q/r.

Aha. Thank you sir. Now I just feel silly.

bikeworkshop · Jul 6, 2025

A rear 135 axle is 10mm
So the dropout is a little over 10mm wide.
Front axle is 9mm.

The skewers themselves are 5mm

moonlite · Jul 6, 2025

bikeworkshop said:
A rear 135 axle is 10mm
So the dropout is a little over 10mm wide.
Front axle is 9mm.

The skewers themselves are 5mm

Thanks! In 30 years' messing about with bikes, I never knew this. And could have just measured one of my bikes' dropouts.

bikeworkshop · Jul 6, 2025

Vintage British kit was often 3/8" rear.
Slightly over 9.5mm
Occasionally you'll find a dropout too tight for 10mm.
S-A 13/32", 10.3mm

Campag and others made 9.5mm rear axles, but with a different pitch obvs.

ishaw · Jul 6, 2025

Who knew, aside from those that did. I always thought a qr axle was 9mm at both ends too. Blooming standards

Confusing myself: 10mm rear QR axle converter?

moonlite

highlandsflyer

Retro Wizard

moonlite

bikeworkshop

Old School Grand Master

moonlite

bikeworkshop

Old School Grand Master

ishaw

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