Bill Wheeler <
[email protected]> wrote in message
news:<
[email protected]>...
> On 17 Apr 2003 09:19:17 -0700,
[email protected] (Spider) wrote:
>
> [snip]
>
> Lord Beelzey, thanks for posting the thread.....BUT one huge fscking B-U-T!
>
> "Some" of the descriptions of the QR coming loose ALL stink of someone not knowing how to
> use a QR.
>
> A QR LOCKS into place and is NOT repeat NOT screwed into place. I think most of you know
> what I mean.
>
> You simply don't screw a QR until it is tight.
>
> 1. Set QR in open position.
> 2. Screw on until you can close it tight with a fair amount of pressure.
>
> Of course some QR's may suck, of course disc probably do put more stress on brake side of the
> wheel, but I don't think that a "properly" maintained, quality QR will come open under braking
> from discs.
>
> Peace, Bill(going to experiment with a loose QR)Wheeler
Yeah, well, after reading what James Annan had to say, in addition to what Jobst Brandt (an
engineer) says, I think that more rigorous experiments are in order. I think that you are
correct in that:
1.) Misapplication of the QR is to blame in some of the cases.
2.) Crappy QRs might also cause some of the other cases.
But it is incorrect to say that the QR doesn't have a "screwing component" (shut up, Rimmer.) And
the forces discussed on James' website do seem to bear this out.
Rigorous, controlled experimentation needs to be done. And you can bet your ass that the fork
manufacturers probably won't be doing it.
I would hope that the takeaway message is to be careful when you do up your fork QR if you have disk
brakes. And check the thing in the ride somewhere, just to make sure. Sorta like a helmet - it may
not help, but it probably won't hurt. But if you want to shout "B.S." on it, talk to Jobst. He can
talk engineer pretty goodly.
Spider