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Beloki losing rear tire... Tubular problem?
When reading that Beloki had rolled his rear tire, it brought to mind
two things; first, Jobst's assertions that tubulars are bad in the alps due to melting glue, and second, that heavy rear braking in that situation has been discussed as a bad thing in this group. He was also using an 18mm tire. Interesting, when some using clinchers don't seem slowed at all, and he might not have so many broken bones with them. Whitfit. |
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#2
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Beloki losing rear tire... Tubular problem?
An anonymous poster wrote:
When reading that Beloki had rolled his rear tire, it brought to mind two things; first, Jobst's assertions that tubulars are bad in the alps due to melting glue, and second, that heavy rear braking in that situation has been discussed as a bad thing in this group. He was also using an 18mm tire. Interesting, when some using clinchers don't seem slowed at all, and he might not have so many broken bones with them. Could be, but it could also be that the rolled tub was effect, not pause. I haven't seen the video yet, but it was mentioned that he had fishtailed. This suggests to me that he may have used his rear brake when he shouldn't have. See: http://sheldonbrown.com/brakturn.html Sheldon "One Brake At A Time" Brown +---------------------------------------------------------+ | It is good to learn from your mistakes; | | It is better to learn from the mistakes of others. | +---------------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
#3
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Beloki losing rear tire... Tubular problem?
That's France for you (and other countries in Europe also) Roads less
travelled on get patched up after the winter with gravel and tar (It's cheaper and quicker propably), It's better than pottholes though. Peter "Bill Davidson" wrote in message news:JyFQa.23$He.15@fed1read03... Sheldon Brown wrote: Could be, but it could also be that the rolled tub was effect, not pause. I haven't seen the video yet, but it was mentioned that he had fishtailed. This suggests to me that he may have used his rear brake when he shouldn't have. Yeah. It was a hard right turn on a fast winding descent. He and Lance were trying to chase down Vinokourov so they were pushing it. Beloki's back wheel slid out way to his left and then slid back to his right and he fell down the hill sideways on his right side. It looked very very painful. It was a sad thing to see. He was a big part of making this year's tour interesting. The way he slid, it did look like rear braking may have been at fault but it's hard to tell for sure. A lot of people were talking about tar on the road melting and making it slippery. Who the hell still uses tar for pavement? I thought that went out 50-60 years ago. At least Lance came out unscathed; though his little cycle cross solution to collision avoidance did cost him a little time to Vinokourov (though obviously not as much as crashing would have). --Bill Davidson -- Please remove ".nospam" from my address for email replies. |
#4
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Beloki losing rear tire... Tubular problem?
From the photos, it appears that he was riding on clinchers, not tubulars
(based on what looks very much like a Velox rimstrip on his wheel). I'm pretty sure they're clinchers, the higher sidewalls are also clearly visible: http://www.velonews.com/images/details/4520.5461.f.jpg The tyre getting of the rim is propably the result of the crash and not the cause. "Mike Jacoubowsky/Chain Reaction Bicycles" wrote in message . .. From the photos, it appears that he was riding on clinchers, not tubulars (based on what looks very much like a Velox rimstrip on his wheel). --Mike-- Chain Reaction Bicycles www.ChainReaction.com "whitfit" wrote in message om... When reading that Beloki had rolled his rear tire, it brought to mind two things; first, Jobst's assertions that tubulars are bad in the alps due to melting glue, and second, that heavy rear braking in that situation has been discussed as a bad thing in this group. He was also using an 18mm tire. Interesting, when some using clinchers don't seem slowed at all, and he might not have so many broken bones with them. Whitfit. |
#5
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Beloki losing rear tire... Tubular problem?
----- Original Message -----
From: "Ronald" Newsgroups: rec.bicycles.tech Sent: Monday, July 14, 2003 6:47 PM Subject: Beloki losing rear tire... Tubular problem? From the photos, it appears that he was riding on clinchers, not tubulars (based on what looks very much like a Velox rimstrip on his wheel). I'm pretty sure they're clinchers, the higher sidewalls are also clearly visible: http://www.velonews.com/images/details/4520.5461.f.jpg The tyre getting of the rim is propably the result of the crash and not the cause. I think you're right about the clincher tire. I just read the Velonews account and Armstrong stated that Beloki had locked up his brakes, the rear wheel started to slide and the tire blew. FWIW, I had the same thing happen to me about 20 years ago coming into a hard turn after screaming my (then) 185 lbs down a hill near Ft Ancient, OH. By some miracle, I managed to stay upright, although my Anquetil cleats lost a bit of depth from being used as outriggers! |
#6
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Beloki losing rear tire... Tubular problem?
"P. Hardewig @fuse.net" pjwignospam wrote in message
... ----- Original Message ----- From: "Ronald" Newsgroups: rec.bicycles.tech Sent: Monday, July 14, 2003 6:47 PM Subject: Beloki losing rear tire... Tubular problem? From the photos, it appears that he was riding on clinchers, not tubulars (based on what looks very much like a Velox rimstrip on his wheel). I'm pretty sure they're clinchers, the higher sidewalls are also clearly visible: http://www.velonews.com/images/details/4520.5461.f.jpg The tyre getting of the rim is propably the result of the crash and not the cause. I think you're right about the clincher tire. I just read the Velonews account and Armstrong stated that Beloki had locked up his brakes, the rear wheel started to slide and the tire blew. FWIW, I had the same thing happen to me about 20 years ago coming into a hard turn after screaming my (then) 185 lbs down a hill near Ft Ancient, OH. By some miracle, I managed to stay upright, although my Anquetil cleats lost a bit of depth from being used as outriggers! Doubt very much those are clinchers; the day before they were on carbon-rim tubulars; see http://www.olntv.com/tdf03/tech2.html for a look. The lighter strip on the rim is either tire glue or more likely, the tire pulled away from it's base tape under the strain of the crash and that's what you see. I rolled a conti sprinter once back when they were prone to doing that, and the remaining base tape looked just about like that. I'd be more inclined to blame the notoriously spotty braking manners of carbon rims. Bad road surface + hard-to-modulate brakes + tires that peel off when you get 'em sideways = big ouch. Just speculation of course, but it wouldn't be the first time that compromising function for light weight put a rider on the deck. Just ask Tyler... As an aside, this is the first year Beloki hasn't used a 650-wheeled bike in the mountains. Last year when they first rode the carbon TCR's, he was the only guy on Once to still use a special aluminum bike with smaller wheels on the climbing stages - a holdover from the days of Jalabert, who used them in the mountains until his retirement. |
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Beloki losing rear tire... Tubular problem?
From what I heard after the fact, from Phil & Paul, was that Beloky
started to slide on a soft patch of tar and panic-braked (both wheels) I was watching the 5 PM replay, so they had more info at this time. The rear tire blew and came off (very likely, especially if he was on clinchers). The bare rim dug into the tar, causing a violent reverse fishtail which hurled him over the handlebars, as he was unable to compensate in time. This is what it looked like what happened. In the slo-mo, you can see him sliding, a rear wheel slide which he is in control over. Then the tire comes off, the bike whips back and he goes head over handlebars. May you have the wind at your back. And a really low gear for the hills! Chris Chris'Z Corner "The Website for the Common Bicyclist": http://www.geocities.com/czcorner |
#8
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Beloki losing rear tire... Tubular problem?
In article ,
Sheldon Brown wrote: An anonymous poster wrote: When reading that Beloki had rolled his rear tire, it brought to mind two things; first, Jobst's assertions that tubulars are bad in the alps due to melting glue, and second, that heavy rear braking in that situation has been discussed as a bad thing in this group. He was also using an 18mm tire. Interesting, when some using clinchers don't seem slowed at all, and he might not have so many broken bones with them. Big Mig used clinchers in the mountains, presumably for this reason as a large and heavy rider he was going to be braking hard. Could be, but it could also be that the rolled tub was effect, not pause. I haven't seen the video yet, but it was mentioned that he had fishtailed. This suggests to me that he may have used his rear brake when he shouldn't have. The video clip I saw on the evening news showed a dramatic fishtail- almost sideways in one direction, then the other, and *boom* he hit the pavement hard. Followed by Armstrong plowing off the road and through a field basically down the fall line, then hopping off the bike and running onto the road and remounting. Not quite with the smooth cyclo-cross style of, say, Daniele Pontoni or Adri van der Poel, but entertaining none the less. He must have been ****ting bricks! |
#9
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Beloki losing rear tire... Tubular problem?
In article JyFQa.23$He.15@fed1read03,
Bill Davidson wrote: A lot of people were talking about tar on the road melting and making it slippery. Who the hell still uses tar for pavement? I thought that went out 50-60 years ago When I was in the Alps last summer, it looked like the seam patches were tar with some sort of greenish sand on top rather than asphalt mix. |
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