Sobering thoughts on disk brakes.



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N

Nelson Binch

Guest
"Spider" <[email protected]> wrote in message
news:[email protected]...
| The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
|
| Since we're the folks who use those the most, it might be useful to get all the info.
|
| Long link...
|
|
http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Annan&num=100&hl=
en&lr=&ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_maxd=17&as_maxm=4&as_maxy=20
03&filter=0
|
| Sobering reading for those of us with disk brakes on QR forks.

I have seen the website of one fellow who had some difficulty. I can't know for sure, but it looked
to me like he actually *did* install a skewer improperly.

Still a lot to think about, though if there was a real serious problem it would have surfaced by
now. Somebody would be getting sued.

---
__o _`\(,_ Cycling is life, (_)/ (_) all the rest, just details. Nelson Binch =^o.o^=
http://intergalax.com

Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.473 / Virus Database: 271 -
Release Date: 4/17/2003
 
J

Jan Sacharuk

Guest
In article <[email protected]>, Spider wrote:
> The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
>
> Since we're the folks who use those the most, it might be useful to get all the info.
>
> Long link...
>
> http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Annan&num=100&hl=en&lr=&-
> ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_maxd=17&as_maxm=4&as_maxy=2003&filter=0

Here's the same link, but shortened: http://makeashorterlink.com/?Y2AF15F34

JS

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B

Bill Wheeler

Guest
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

The mind serves properly as a window glass rather than as a reflector, that is, the mind should give
an immediate view instead of an interpretation of the world.
:-]
 
B

Bill Wheeler

Guest
On 17 Apr 2003 09:19:17 -0700, [email protected] (Spider) wrote:

[snip QR disc issue]

Okay, I finished a very quick experiment.

First I complete opened my QR while the bike is upright and I'm standing over it.

I gently rolled the bike forward and applied the front brake.

As expected the wheel moved to the left, the side the discs is on. Again this is normal
and expected.

Next I loosened the QR and locked it. Much much looser than I would normally do.

I gently rolled the bike forward and applied the front brake.

Nothing out of the ordinary happened.

So I got on the bike and rode a put moderate pressure on the front brake.

Still no problem.

So I did a quick full stop causing my rear to lift. I felt and saw the front wheel move.....holy
sh!t it's amazing what a loose QR can cause.

People tighten you QR's discs or no dics and do it properly.

Peace, Bill The mind serves properly as a window glass rather than as a reflector, that is, the mind
should give an immediate view instead of an interpretation of the world.
:-]
 
S

Slash

Guest
On Thu, 17 Apr 2003 17:58:59 GMT, Jan Sacharuk <[email protected]> scribbled:

>In article <[email protected]>, Spider wrote:
>> The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
>>
>> Since we're the folks who use those the most, it might be useful to get all the info.
>>
>> Long link...
>>
>> http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Annan&num=100&hl=en&lr=-
>> &ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_maxd=17&as_maxm=4&as_maxy=2003&filter=0
>
>Here's the same link, but shortened: http://makeashorterlink.com/?Y2AF15F34
>
>JS

Even smaller!

http://tinyurl.com/9sj9

Sorry, in one of those wacky moods, I am.

-Slash
--
"Ebert Victorious"

- The Onion
 
C

Carla A-G

Guest
"Spider" <[email protected]> wrote in message
news:[email protected]...
> The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
>
> Since we're the folks who use those the most, it might be useful to get all the info.
>
> Long link...
>
>
http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Ann
an&num=100&hl=en&lr=&ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_
maxd=17&as_maxm=4&as_maxy=2003&filter=0
>
> Sobering reading for those of us with disk brakes on QR forks.
>
> Spider

Do a deja search. I brought this subject up a while back...

- CA-G

Can-Am Girls Kick Ass!
 
S

Spider

Guest
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
 
S

Spider

Guest
"Carla A-G" <[email protected]> wrote in message news:<[email protected]>...
> "Spider" <[email protected]> wrote in message
> news:[email protected]...
> > The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
> >
> > Since we're the folks who use those the most, it might be useful to get all the info.
> >
> > Long link...
> >
> >
> http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Ann
> an&num=100&hl=en&lr=&ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_
> maxd=17&as_maxm=4&as_maxy=2003&filter=0
> >
> > Sobering reading for those of us with disk brakes on QR forks.
> >
> > Spider
>
> Do a deja search. I brought this subject up a while back...

Ahh, sorry - I didn't see it.

Spider
 
D

Dave W

Guest
On 18 Apr 2003 09:19:41 -0700, [email protected] (Spider) wrote:

>"Carla A-G" <[email protected]> wrote in message news:<[email protected]>...
>> "Spider" <[email protected]> wrote in message
>> news:[email protected]...
>> > The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
>> >
>> > Since we're the folks who use those the most, it might be useful to get all the info.
>> >
>> > Long link...
>> >
>> >
>> http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Ann
>> an&num=100&hl=en&lr=&ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_
>> maxd=17&as_maxm=4&as_maxy=2003&filter=0
>> >
>> > Sobering reading for those of us with disk brakes on QR forks.
>> >
>> > Spider
>>
>> Do a deja search. I brought this subject up a while back...
>
>Ahh, sorry - I didn't see it.
>
>Spider

oh I forgot, you don't really ride do you. Sorry, my bad.

Dave (talk about lame, and we'd be talking bout you!)
 
S

Spider

Guest
S

Spider

Guest
Dave W <[email protected]> wrote in message news:<[email protected]>...
> On 18 Apr 2003 09:19:41 -0700, [email protected] (Spider) wrote:
>
> >"Carla A-G" <[email protected]> wrote in message
> >news:<[email protected]>...
> >> "Spider" <[email protected]> wrote in message
> >> news:[email protected]...
> >> > The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
> >> >
> >> > Since we're the folks who use those the most, it might be useful to get all the info.
> >> >
> >> > Long link...
> >> >
> >> >
> >> http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Ann
> >> an&num=100&hl=en&lr=&ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_
> >> maxd=17&as_maxm=4&as_maxy=2003&filter=0
> >> >
> >> > Sobering reading for those of us with disk brakes on QR forks.
> >> >
> >> > Spider
> >>
> >> Do a deja search. I brought this subject up a while back...
> >
> >Ahh, sorry - I didn't see it.
> >
> >Spider
>

>
> oh I forgot, you don't really ride do you. Sorry, my bad.

Wow, your THC must be getting low, Dave. Time for you to take another bong hit...

Spider
 
D

Dave W

Guest
On 18 Apr 2003 20:25:43 -0700, [email protected] (Spider) wrote:

>Dave W <[email protected]> wrote in message news:<[email protected]>...
>> On 18 Apr 2003 09:08:15 -0700, [email protected] (Spider) wrote:
>>
>> >Bill Wheeler <[email protected]> wrote in message
>> >news:<[email protected]>...
>> >> On 17 Apr 2003 09:19:17 -0700, [email protected] (Spider) wrote:
>> >>
>> He can talk engineer pretty goodly.
>>
>> >:)
>> >
>> >Spider
>>
>> What amazes me is that YOU can actually understand it.
>
>From the likes of you, that comment is particularly hilarious.
>
>Spider

Glad to help the less fortunate in the brain area anytime.
 
D

Dave W

Guest
On 18 Apr 2003 20:27:11 -0700, [email protected] (Spider) wrote:

>Dave W <[email protected]> wrote in message news:<[email protected]>...
>> On 18 Apr 2003 09:19:41 -0700, [email protected] (Spider) wrote:
>>
>> >"Carla A-G" <[email protected]> wrote in message
>> >news:<[email protected]>...
>> >> "Spider" <[email protected]> wrote in message
>> >> news:[email protected]...
>> >> > The link here is to some threads in rec.bikes.tech about disk brakes and quick-releases.
>> >> >
>> >> > Since we're the folks who use those the most, it might be useful to get all the info.
>> >> >
>> >> > Long link...
>> >> >
>> >> >
>> >> http://groups.google.com/groups?q=+%22disk+brakes%22+author:James+author:Ann
>> >> an&num=100&hl=en&lr=&ie=UTF-8&as_drrb=b&as_mind=6&as_minm=3&as_miny=2003&as_
>> >> maxd=17&as_maxm=4&as_maxy=2003&filter=0
>> >> >
>> >> > Sobering reading for those of us with disk brakes on QR forks.
>> >> >
>> >> > Spider
>> >>
>> >> Do a deja search. I brought this subject up a while back...
>> >
>> >Ahh, sorry - I didn't see it.
>> >
>> >Spider
>>

>>
>> oh I forgot, you don't really ride do you. Sorry, my bad.
>
>Wow, your THC must be getting low, Dave.

Never.

Time for you to take another bong hit...

OK, I think I will. Just because you said so.
>
>Spider

Typical tripe from a typical moron.
 
S

Spider

Guest
Dave W <[email protected]> wrote in message news:<[email protected]>...
> On 18 Apr 2003 20:25:43 -0700, [email protected] (Spider) wrote:
>
> >Dave W <[email protected]> wrote in message news:<[email protected]>...
> >> On 18 Apr 2003 09:08:15 -0700, [email protected] (Spider) wrote:
> >>
> >> >Bill Wheeler <[email protected]> wrote in message
> >> >news:<[email protected]>...
> >> >> On 17 Apr 2003 09:19:17 -0700, [email protected] (Spider) wrote:
> >> >>
> >> He can talk engineer pretty goodly.
> >>
> >> >:)
> >> >
> >> >Spider
> >>
> >> What amazes me is that YOU can actually understand it.
> >
> >From the likes of you, that comment is particularly hilarious.
> >
> >Spider
>
>
> Glad to help the less fortunate in the brain area anytime.

There *are* none less fortunate than you in that regard.

But please, continue - it amuses me to no end.

Spider
 
D

Dave W

Guest
On 20 Apr 2003 13:04:00 -0700, [email protected] (Spider) wrote:

>Dave W <[email protected]> wrote in message news:<[email protected]>...
>> On 18 Apr 2003 20:25:43 -0700, [email protected] (Spider) wrote:
>>
>> >Dave W <[email protected]> wrote in message news:<[email protected]>...
>> >> On 18 Apr 2003 09:08:15 -0700, [email protected] (Spider) wrote:
>> >>
>> >> >Bill Wheeler <[email protected]> wrote in message
>> >> >news:<[email protected]>...
>> >> >> On 17 Apr 2003 09:19:17 -0700, [email protected] (Spider) wrote:
>> >> >>
>> >> He can talk engineer pretty goodly.
>> >>
>> >> >:)
>> >> >
>> >> >Spider
>> >>
>> >> What amazes me is that YOU can actually understand it.
>> >
>> >From the likes of you, that comment is particularly hilarious.
>> >
>> >Spider
>>
>>
>> Glad to help the less fortunate in the brain area anytime.
>
>There *are* none less fortunate than you in that regard.

yes you are, admit it.

>
>But please, continue - it amuses me to no end.

No, now back in your box.

TOY!
 
D

Dave W

Guest
On 20 Apr 2003 13:00:03 -0700, [email protected] (Spider) wrote:

>Dave W <[email protected]> wrote in message news:<[email protected]>...
>
>[snip buid-up to another humpety-hump]
>

Spot the error doofus...

>> Typical tripe from a typical moron.
>
>You just never stop with the irony.

And you never stop with the idiocy. irony is tame compared to that!
>
>Every post is more funny than the last.

Yes, yours are, aren't they?
 
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