"Actually you are the first person to bring up this issue"

"G.T." wrote in message
om...

"Nelson Binch" wrote in message
. com...
Cross posts I don't participate in removed.

"James Annan" wrote in message
...
It's now a year since the QR/disk brake problem hit the headlines, and
I
thought some of you might be interested in hearing how the
manufacturers
are dealing with it.


Wow! How many people are having this problem? Out of how many disk
users?

Sorry, but every single time I've seen pictures of these 'incidents' it
looks like improperly set skewers to me.



It's much easier to blame the user. That's what you're doing and that's
what the manufacturers are doing. Even though they know the forces acting
to rip the wheel out of the dropout are high.

Greg


Been braking hard on bumpy bits for over a year now with my Manitou Magnums
with Shimano Drybollock discs with no probs.
I might believe it if I saw it happen, but I'm not impressed with the
quasi-scientific conspiration theorists.
Annan has an axe to grind, and I think he is scaremongering un-necessarily
IMHO.

Twohat (because two heads are better than one)

"Twohat" wrote in message
...

"G.T." wrote in message
om...


It's much easier to blame the user. That's what you're doing and that's
what the manufacturers are doing. Even though they know the forces
acting
to rip the wheel out of the dropout are high.

Greg


Been braking hard on bumpy bits for over a year now with my Manitou
Magnums
with Shimano Drybollock discs with no probs.
I might believe it if I saw it happen, but I'm not impressed with the
quasi-scientific conspiration theorists.
Annan has an axe to grind, and I think he is scaremongering un-necessarily
IMHO.


I hate scaremongering more than anybody (nobody is better at it than the US
media), but I've read a couple of scary accounts, and believe me, I'll be
keeping my front skewer very tight. And some day I'll switch to a
through-axle.

Greg

"James Annan" wrote in message
...
It's now a year since the QR/disk brake problem hit the headlines, and I
thought some of you might be interested in hearing how the manufacturers
are dealing with it.

It's actually 1 Yr and 3 days :-(

Been wondering whether to get involved but decided I'd would.
Comments in reply to other posts
Legal action still pending, really ought to get on with it before someone
else goes the same way.

For anyone wondering what I'm on about see the link below

Russ
www.russ-appeal.org.uk

Simon Daw wrote:
QR skewers certainly tighten the bearings, although it's something
that's always bemused me somewhat; how do they make so much
difference when the cones are locked onto a pretty un-compressable
axle? I suppose it's just that very, very little movement of the
cones on the axle is required to make a difference.

The axle does compress. Doesn't take much to affect the bearings.

~PB

Merlin wrote:

Wow! How many people are having this problem? Out of how many disk

users?

Sorry, but every single time I've seen pictures of these 'incidents' it
looks like improperly set skewers to me.


misuse is the most common cause of product malfunction.

Yeah, especially guns, cars, and alcohol.
"Hold my beer, grab the wheel, hand me my gun, and watch this!"
:-)
Shawn

"TBF" wrote in message
le.rogers.com...
"James Annan" wrote in message
...
It's now a year since the QR/disk brake problem hit the headlines, and I
thought some of you might be interested in hearing how the manufacturers
are dealing with it.


I keep hearing about this issue with greater frequency, but I've been
running discs for a few years now and it's only popped out once in that
time. It was my fault on that occasion, I realized afterwards that I
hadn't
properly tightend the QR.

Now that it's been mentioned though, I have noticed the "Lawyer Lip" on my
Bomber. It's a few years old too but it definitely keeps the wheel on even
with the QR loosened.

Not when you're braking really hard with discs it doesn't

That was a line I used in the past, and I'd never had a wheel come out,
thought I was safe, had even tried to convince James it wasn't a problem.
Then it did - at the worst possible moment, 25 plus mph - very steep rocky
downhill. QR must have loosened somehow, don't know how but if I hadn't done
it up properly it'd have come out in the three hours previously, I knew
something wasn't right so tried to slow down, braking hard just ripped the
front wheel out and I endoed big time. I'll never get the chance again, all
because some idiot bike designers never thought about a clearly obvious
problem with discs and caliper positioning ripping wheels out of dropouts,
had the caliper been on the other side of the fork leg braking would have
forced the QR into rather than out of the drop outs and I'd have at least
been able to lose a lot more speed before stacking but would likely have
been able to brake to a stop.

It's only a matter of time until some-one else injurs themselves big time
too.

Russ
www.russ-appeal.org.uk

It can happen to anyone,V brake or Disc brake. A vine
grabbed the QR and the wheel started rubbing the frame. I knew it was
time to stop and check things out. Or you have te guy that doesn't know
how to properly tighten a QR and it opens.
6 out of 7 of my bikes are V brakes and that 7th one I wouldn't give it
up to go back to V brakes.

I MTB 2004

"Pete Biggs" wrote in message ...
Jon Senior wrote:

Is there such a thing as too tight? Is there a danger of the skewer
being over-stressed and being more likely to fail?

With quick-release, if you have the skewers too tight, they can make
the hub bearings bind. Giant's bike manual suggested that the levers
were too loose if closing them didn't leave an imprint in my palm.
Doing so meant the wheels stopped rotating within about 3/4
revolution, compared to around 20 when loose.

Cones can be loosened to compensate for a tighter skewer. In other words,
readjust so there's more play in the hub before QR is done up, to cope
with the greater axle compression when it is closed.
I don't think it's an issue for cartridge bearings.

Chris King specifically warn against overtightening the skewer,
because compressing the (presumably cartridge) bearing will accelerate
wear and result in a wheel which is chronically wobbbly.

I don't know how tight a skewer would have to be to make it
significantly more likely to fail in itself, but I would imagine there
must be some tendency in that direction. Anyone who really cares could
always try asking the manufacturers themselves...but from what I've
seen, those who supply recommendations (eg lever torque) tend to give
both a lower and an upper limit.

James

"Jacobe Hazzard" wrote in message
e.rogers.com...
Shaun Rimmer wrote:
...or come back to rim brakes ;-)

Infidel! Heretic! Hiccup!

Hey, it's dave and shaun. Fancy meeting you guys here.


It's a small net.....and a mad, mad, mad world... ;-)

"Frobnitz" wrote in message ...

Have you contacted someone like Watchdog (UK consumer affairs program, for
the non-UK readers on the x-post) to see if they are interested.

No, I don't think there is any point in that. Firstly, it doesn't
affect me directly, and secondly, they are hardly going to take a
complaint seriously that has only ever been noticed by one rider (and
he didn't even have a crash or anything, it's just that his wheel
won't stay put). Since it's already been cleared by the CPSC, there is
obviously no design problem and I guess I must have made the whole
thing up. It was quite a hassle making all the fake user accounts on
singletrackworld:

http://www.singletrackworld.com/foru...34406&t=933851

and just to make it seem more authentic I forged this review and
hacked into Marin's site:

http://www.marin.co.uk/marin-2004/reviews.php?ID=47

James