Disc Brakes Letting Some Pros Down
#51
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What did the three finishers ahead of him ride?
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"It is the unknown around the corner that turns my wheels." -- Heinz Stücke
"It is the unknown around the corner that turns my wheels." -- Heinz Stücke
#52
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And the final word on this:
https://www.cyclingnews.com/news/spe...ke-complaints/
A 'significant impact' was to blame for the broken spoke, says Roval
Chris Wehan, Roval’s category leader, told CyclingTips that not only was an impact the cause of the broken spoke, but the spoke in question was actually a drive-side spoke. However That means it was on the opposite side from the disc rotor, so head would have to travel through the rotor, rotor arms, and then hub shell to get to the spoke heads on the other side.
https://www.cyclingnews.com/news/spe...ke-complaints/
A 'significant impact' was to blame for the broken spoke, says Roval
Chris Wehan, Roval’s category leader, told CyclingTips that not only was an impact the cause of the broken spoke, but the spoke in question was actually a drive-side spoke. However That means it was on the opposite side from the disc rotor, so head would have to travel through the rotor, rotor arms, and then hub shell to get to the spoke heads on the other side.
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#53
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#54
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I'm a USAF trained wrench and troubleshooter on the F-16 for the airframe, hydraulics, pneumatics, engine, etc., and a retired aviation mishap investigator; trained in metallurgy, stippling points, heat and stress fatigue of materials including alloys, ti, carbon, plastics, etc,. which is a fraction of what's involved in investigating major accidents, systems, part, human failures.
I was just killing a moment of boredom when I posted this very interesting story about supposed failure.
Cheers.
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Ron - Tucson, AZ
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I'm a USAF trained wrench and troubleshooter on the F-16 for the airframe, hydraulics, pneumatics, engine, etc., and a retired aviation mishap investigator; trained in metallurgy, stippling points, heat and stress fatigue of materials including alloys, ti, carbon, plastics, etc,. which is a fraction of what's involved in investigating major accidents, systems, part, human failures.
I was just killing a moment of boredom when I posted this very interesting story about supposed failure.
Cheers.
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#56
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"Utter BS" isn't a finding classification for post investigation findings, and humans are highly inaccurate sources for recounting what actually happened. So in the investigative field we record what is said, interview, but always turn over every stone, and let the evidence tell the story.
...but I'd say Wilco had a bad day, and found a way to make it worse.
...but I'd say Wilco had a bad day, and found a way to make it worse.
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"Utter BS" isn't a finding classification for post investigation findings, and humans are highly inaccurate sources for recounting what actually happened. So in the investigative field we record what is said, interview, but always turn over every stone, and let the evidence tell the story.
...but I'd say Wilco had a bad day, and found a way to make it worse.
...but I'd say Wilco had a bad day, and found a way to make it worse.
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"Utter BS" isn't a finding classification for post investigation findings, and humans are highly inaccurate sources for recounting what actually happened. So in the investigative field we record what is said, interview, but always turn over every stone, and let the evidence tell the story.
...but I'd say Wilco had a bad day, and found a way to make it worse.
...but I'd say Wilco had a bad day, and found a way to make it worse.
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I'm a USAF trained wrench and troubleshooter on the F-16 for the airframe, hydraulics, pneumatics, engine, etc., and a retired aviation mishap investigator; trained in metallurgy, stippling points, heat and stress fatigue of materials including alloys, ti, carbon, plastics, etc,. which is a fraction of what's involved in investigating major accidents, systems, part, human failures.
I was just killing a moment of boredom when I posted this very interesting story about supposed failure.
Cheers.
I was just killing a moment of boredom when I posted this very interesting story about supposed failure.
Cheers.
"Utter BS" isn't a finding classification for post investigation findings, and humans are highly inaccurate sources for recounting what actually happened. So in the investigative field we record what is said, interview, but always turn over every stone, and let the evidence tell the story.
...but I'd say Wilco had a bad day, and found a way to make it worse.
...but I'd say Wilco had a bad day, and found a way to make it worse.
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There's a difference between attacking someone and being critical of their actions. Your actions have been ridiculous. You found an article with a meritless accusation and you either tried to give it merit or you made a clumsy attempt to troll. Your actions since have consisted of attempts of face-saving posturing by citing skills, credentials, and procedures that, if actually employed, would have immediately seen the rider's accusation for what it was - unmitigated BS.
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#64
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There's a difference between attacking someone and being critical of their actions. Your actions have been ridiculous. You found an article with a meritless accusation and you either tried to give it merit or you made a clumsy attempt to troll. Your actions since have consisted of attempts of face-saving posturing by citing skills, credentials, and procedures that, if actually employed, would have immediately seen the rider's accusation for what it was - unmitigated BS.
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Did Kelderman's disc brakes break his spokes? No, and here's why.
Further: before a spoke could fail under heat stress, the rotor would be “fire-red” and melting both the rotor and the pads, the mineral oil would have long since boiled off, all of which would result in complete brake failure. If that wasn’t warning enough, and should a rider still be upright and somehow still pulling heavy on the brakes, Leven imagines the hub bearings would expand next damaging the hub shell and providing an additional warning of imminent danger.
Can disc brakes overheat spokes?
No. Not only was an impact the cause of the broken spoke, but the spoke in question was actually a drive-side spoke. That means it was on the opposite side from the disc rotor, so heat would have to travel through the rotor, rotor arms, and then hub shell to get to the spoke heads on the other side.Further: before a spoke could fail under heat stress, the rotor would be “fire-red” and melting both the rotor and the pads, the mineral oil would have long since boiled off, all of which would result in complete brake failure. If that wasn’t warning enough, and should a rider still be upright and somehow still pulling heavy on the brakes, Leven imagines the hub bearings would expand next damaging the hub shell and providing an additional warning of imminent danger.
What about the spokes?
Roval uses DT Swiss Aerolite spokes in its new Alpinist II wheelset. The 18/10 stainless steel DT Swiss uses in its Aerolite spokes is known for its heat resistant properties and can withstand temperatures up to 925°C (1,697°F) before it starts degrading.
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Anywho, I'll take my leave - what's on offer here isn't much and it's clearly circling the drain. Have fun.
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My experience is that, when failures occur, end users tend to blame the component, sub-system, or process that they know the least about.
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No. Not only was an impact the cause of the broken spoke, but the spoke in question was actually a drive-side spoke. That means it was on the opposite side from the disc rotor, so heat would have to travel through the rotor, rotor arms, and then hub shell to get to the spoke heads on the other side.
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#69
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Well, the comedy is you claimed this post was perhaps a weak attempt at trolling, and if true, it was the weak who kept responding to it, making the thread outlast the story itself. That's comedy.
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Last edited by Miles2go; 05-18-22 at 12:07 PM.
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Last edited by seypat; 05-18-22 at 01:45 PM.
#72
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#73
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https://cyclingtips.com/2022/05/did-...and-heres-why/
Can disc brakes break spokes?
The simple answer is, yes.
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Drum brakes. Problems solved.
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https://cyclingtips.com/2022/05/did-...and-heres-why/
Can disc brakes break spokes?
The simple answer is, yes.
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