no, because a rear wheel jam is unlikely to result in the OTB that a front wheel one would most likely cause ![/quote]I suspect you are in the overwhelming majority, and yet there isn’t (and never has been) a massive number of stories about rear QRs unscrewing themselves. That being the case, I can’t see that precession is a major factor in real life and that either side at the front is actually OK.

The “Trek” recall was due to some levers opening so far that it could catch in the rotor. Around half our hire fleet was affected, even though all the QRs looked externally identical. I can assume it was some sort of machining tolerance in the cam mechanism.

Looks like I’ll be sticking with Shimano then. The DT Swiss things look nice (if a bit pricey). I take it I need 9mm bolt through caps for the hubs and can then use the DTS 9mm RWS with my standard QR fork dropouts (it looks like they also do a version for standard QR hubs.

I understand that it’s generally accepted that the QR lever should be on the disc side (to counter the possibility of loosening?)
I’ve never heard that. Where did you hear it?

In here:
singletrackworld.com/forum/topic/road-bikes-with-discs-do-you-put-front-qr-on-non-disk-side

aracer – Member

damascus » Then brant came up with an industry reason why it should be on the disc side. Might have been to do with the force of being pulled on the disc side etc.

It’s because disk brake forces can result in slight motion of the axle/QR in the dropout which will result in unscrewing the QR. I think the idea is that if the lever is on the left such unscrewing will be obvious, though it won’t be if the nut is on the left. Not an original thought from Brant – though he might have helped publicise it – original theory was James Annan’s I think.

https://web.archive.org/web/20121005235921/http://www.ne.jp/asahi/julesandjames/home/disk_and_quick_release/

Some more links here: https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=james%20annan%20disc%20brake
Personally I’d not buy a new bike (or parts to build one) with discs and QRs – one reason I’d not get a road bike with discs.[/quote]