Errr… As above really.

I know you can convert 135qr to 142 but what about the other way?

Yes, if it’s Pro2Evo for sure. Just swap the end caps.

Ta! So if I had a qr pro 2 already I could swap the caps from that hub to the one set up as a 142 12mm?

Looks like they might use different kits, robob:

http://www.hopetech.com/wp-content/uploads/2015/02/HUB-CONVERSION-KITS-CHART1.pdf

Pro 2 Rear QR Conversion Kit – HUB225
Pro 2 EVO Rear QR Conversion Kit – HUB238

If you have a pro 2 and want a 135 qr, its an easy swap i have an axeland end caps you can have, if you can wait till next week when im back home, the axel works fine but does have a flat edge on one lip. it doesnt effect any performance though.

if it’s nonEVO then you need a 135QR axle. The 142 axle is different.

[EVO hubs it’s just the end caps that need swapping]

But can I take the axle out my existing hub and use that?

Simple answer is NO all the end caps are really is spacers, the internal diameter of the axels are different.

Thanks all. I think that’s clear!