What happened here

Today I'm in a shop buying a jacket, and the chap helping me turns out to be a roadie, pretty near the beginning of his career as a cyclist I would say.

He's got a horror story. He took in his bike for servicing and on picking it up was told that they had to "fix the rear wheel". He goes out riding, the rear wheel collapses, he slams on the brakes, goes over the bars, and ends up with surgery on his elbow and collar bone. The rim is bent into an S shape around the join in the rim. There are no obvious collapsed or ripped out spokes. According to him it isn't a wheel with "few spokes" but one with "many spokes", so a too-low spoke count probably isn't the cause.

So what do you think happened here?

Andre Jute

On 02/04/2013 02:29 PM, Andre Jute wrote:
Today I'm in a shop buying a jacket, and the chap helping me turns out to be a roadie, pretty near the beginning of his career as a cyclist I would say.

He's got a horror story. He took in his bike for servicing and on picking it up was told that they had to "fix the rear wheel". He goes out riding, the rear wheel collapses, he slams on the brakes, goes over the bars, and ends up with surgery on his elbow and collar bone. The rim is bent into an S shape around the join in the rim. There are no obvious collapsed or ripped out spokes. According to him it isn't a wheel with "few spokes" but one with "many spokes", so a too-low spoke count probably isn't the cause.

So what do you think happened here?


What do you mean by "collapses"? Do you mean it did a potato chip
imitation?

On 2/4/2013 1:29 PM, Andre Jute wrote:
Today I'm in a shop buying a jacket, and the chap helping me turns out to be a roadie, pretty near the beginning of his career as a cyclist I would say.

He's got a horror story. He took in his bike for servicing and on picking it up was told that they had to "fix the rear wheel". He goes out riding, the rear wheel collapses, he slams on the brakes, goes over the bars, and ends up with surgery on his elbow and collar bone. The rim is bent into an S shape around the join in the rim. There are no obvious collapsed or ripped out spokes. According to him it isn't a wheel with "few spokes" but one with "many spokes", so a too-low spoke count probably isn't the cause.

So what do you think happened here?


Could be many things including road impact.
Excessive tension on a light rim would also fit that
description.

--
Andrew Muzi
www.yellowjersey.org/
Open every day since 1 April, 1971

On Monday, February 4, 2013 7:45:30 PM UTC, Duane Hébert wrote:
On 02/04/2013 02:29 PM, Andre Jute wrote:

Today I'm in a shop buying a jacket, and the chap helping me turns out to be a roadie, pretty near the beginning of his career as a cyclist I would say.



He's got a horror story. He took in his bike for servicing and on picking it up was told that they had to "fix the rear wheel". He goes out riding, the rear wheel collapses, he slams on the brakes, goes over the bars, and ends up with surgery on his elbow and collar bone. The rim is bent into an S shape around the join in the rim. There are no obvious collapsed or ripped out spokes. According to him it isn't a wheel with "few spokes" but one with "many spokes", so a too-low spoke count probably isn't the cause.



So what do you think happened here?





What do you mean by "collapses"? Do you mean it did a potato chip

imitation?

Precisely, Duane. That is how it was described to me.

I think Andrew Muzi has it: the rim was over-tensioned and then not relieved, but I thought I'd better check with you more knowledgable chaps.

Andre Jute

On 05/02/13 08:24, Andre Jute wrote:
On Monday, February 4, 2013 7:45:30 PM UTC, Duane Hébert wrote:
On 02/04/2013 02:29 PM, Andre Jute wrote:

Today I'm in a shop buying a jacket, and the chap helping me
turns out to be a roadie, pretty near the beginning of his career
as a cyclist I would say.



He's got a horror story. He took in his bike for servicing and on
picking it up was told that they had to "fix the rear wheel". He
goes out riding, the rear wheel collapses, he slams on the
brakes, goes over the bars, and ends up with surgery on his elbow
and collar bone. The rim is bent into an S shape around the join
in the rim. There are no obvious collapsed or ripped out spokes.
According to him it isn't a wheel with "few spokes" but one with
"many spokes", so a too-low spoke count probably isn't the
cause.



So what do you think happened here?





What do you mean by "collapses"? Do you mean it did a potato chip

imitation?

Precisely, Duane. That is how it was described to me.

I think Andrew Muzi has it: the rim was over-tensioned and then not
relieved, but I thought I'd better check with you more knowledgable
chaps.


A sad tale indeed.

I hate it when supposedly more knowledgeable folks turn out to be duds -
the bike shop butchers in this case.

I've had similar experiences with car mechanics. Consequently it takes
me ages to develop some trust in anyone tinkering with my vehicles, and
only resort to using someones services when I really don't have the
capacity (tools, space, time, expertise) to perform the service/repair
myself.

Thankfully the bicycle is one vehicle I haven't needed to employ the
services of a mechanic for. I suggest your jacket salesman learn to
maintain his bicycle and do away with the need for external support.

--
JS.

On Tue, 05 Feb 2013 09:34:11 +1100, James
wrote:

On 05/02/13 08:24, Andre Jute wrote:
On Monday, February 4, 2013 7:45:30 PM UTC, Duane Hébert wrote:
On 02/04/2013 02:29 PM, Andre Jute wrote:

Today I'm in a shop buying a jacket, and the chap helping me
turns out to be a roadie, pretty near the beginning of his career
as a cyclist I would say.



He's got a horror story. He took in his bike for servicing and on
picking it up was told that they had to "fix the rear wheel". He
goes out riding, the rear wheel collapses, he slams on the
brakes, goes over the bars, and ends up with surgery on his elbow
and collar bone. The rim is bent into an S shape around the join
in the rim. There are no obvious collapsed or ripped out spokes.
According to him it isn't a wheel with "few spokes" but one with
"many spokes", so a too-low spoke count probably isn't the
cause.



So what do you think happened here?





What do you mean by "collapses"? Do you mean it did a potato chip

imitation?

Precisely, Duane. That is how it was described to me.

I think Andrew Muzi has it: the rim was over-tensioned and then not
relieved, but I thought I'd better check with you more knowledgable
chaps.


A sad tale indeed.

I hate it when supposedly more knowledgeable folks turn out to be duds -
the bike shop butchers in this case.

I've had similar experiences with car mechanics. Consequently it takes
me ages to develop some trust in anyone tinkering with my vehicles, and
only resort to using someones services when I really don't have the
capacity (tools, space, time, expertise) to perform the service/repair
myself.

Thankfully the bicycle is one vehicle I haven't needed to employ the
services of a mechanic for. I suggest your jacket salesman learn to
maintain his bicycle and do away with the need for external support.


I'm a bit skeptical when I hear these kind of stories. Too often I've
had a chap describe his problem as "it just doesn't run right".
"What's the matter? "Well it just isn't running right and it makes
this funny clicking noise".

Try an fix that complaint.

--
Cheers,

John B.

eyah the minion knew who you thunk you are n feed yawl a line of smoking bull****

https://www.google.com/webhp?hl=en&t...w=1152&bih=610

On 2/4/2013 4:34 PM, James wrote:
I've had similar experiences with car mechanics. Consequently it takes
me ages to develop some trust in anyone tinkering with my vehicles, and
only resort to using someones services when I really don't have the
capacity (tools, space, time, expertise) to perform the service/repair
myself.

Here we have "mechanics" who tighten lugs nuts with an air-impact wrench
at full torque setting. Great fun jumping on the end of lug wrench
trying to break the nuts loose while traffic whizzes by.

--
Tom $herman

On 02-04-2013 14:29, Andre Jute wrote:
Today I'm in a shop buying a jacket, and the chap helping me turns out to be a roadie, pretty near the beginning of his career as a cyclist I would say.

He's got a horror story. He took in his bike for servicing and on picking it up was told that they had to "fix the rear wheel". He goes out riding, the rear wheel collapses, he slams on the brakes, goes over the bars, and ends up with surgery on his elbow and collar bone. The rim is bent into an S shape around the join in the rim. There are no obvious collapsed or ripped out spokes. According to him it isn't a wheel with "few spokes" but one with "many spokes", so a too-low spoke count probably isn't the cause.

So what do you think happened here?

I don't have the expertise to be specific, but it sure seems likely that
the "mechanics" screwed up.

Unfortunately, there is the slim chance that it just failed and wasn't
their fault. And the "benefit of the doubt" may be sufficient to get
them off the hook.

--
Wes Groleau

¡Qué quiero realmente hacer es comer un perrito caliente!
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http://Ideas.Lang-Learn.org/WWW?itemid=463

On Feb 4, 7:29*pm, Andre Jute wrote:
Today I'm in a shop buying a jacket, and the chap helping me turns out to be a roadie, pretty near the beginning of his career as a cyclist I would say.

He's got a horror story. He took in his bike for servicing and on picking it up was told that they had to "fix the rear wheel". *He goes out riding, the rear wheel collapses, he slams on the brakes, goes over the bars, and ends up with surgery on his elbow and collar bone. The rim is bent into an S shape around the join in the rim. There are no obvious collapsed or ripped out spokes. According to him it isn't a wheel with "few spokes" but one with "many spokes", so a too-low spoke count probably isn't the cause.

So what do you think happened here?

Andre Jute

some cnut overtensioned the spokes. Can be quite easy to do with a
narrow wired-on rim and a high leverage nipple key.