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#2
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George Herbert Walker said...
prompts the following question: In a crash with a regular stem, the bars turn easily, pretty well eliminating or markedly reducing the damage to the brake levers and bars, and to the rider too. Additionally, there is no damage to the stem or the steel steerer. But the threadless setup is much tighter on the steerer as pointed out above, and then if the steerer is aluminum, or worse carbon... what happens? Are you and/or the bike hosed? I guess a similar question applies to carbon seatposts that get forcefully turned around while clamped. And what if you have something clamped to the seatpost, like a rack or fender or KlikFix, and it gets forcefully turned around? You must not have read my full post. I was in a crash where my carbon fork and steerer should have been smashed to pieces, but after rebuilding the headset and a careful inspection by two very experienced bike wrenches, nobody can find a thing wrong with it. |
#3
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George Herbert Walker said...
prompts the following question: In a crash with a regular stem, the bars turn easily, pretty well eliminating or markedly reducing the damage to the brake levers and bars, and to the rider too. Additionally, there is no damage to the stem or the steel steerer. But the threadless setup is much tighter on the steerer as pointed out above, and then if the steerer is aluminum, or worse carbon... what happens? Are you and/or the bike hosed? I guess a similar question applies to carbon seatposts that get forcefully turned around while clamped. And what if you have something clamped to the seatpost, like a rack or fender or KlikFix, and it gets forcefully turned around? You must not have read my full post. I was in a crash where my carbon fork and steerer should have been smashed to pieces, but after rebuilding the headset and a careful inspection by two very experienced bike wrenches, nobody can find a thing wrong with it. |
#4
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SuperSlinky wrote in message t...
George Herbert Walker said... prompts the following question: In a crash with a regular stem, the bars turn easily, pretty well eliminating or markedly reducing the damage to the brake levers and bars, and to the rider too. Additionally, there is no damage to the stem or the steel steerer. But the threadless setup is much tighter on the steerer as pointed out above, and then if the steerer is aluminum, or worse carbon... what happens? Are you and/or the bike hosed? I guess a similar question applies to carbon seatposts that get forcefully turned around while clamped. And what if you have something clamped to the seatpost, like a rack or fender or KlikFix, and it gets forcefully turned around? You must not have read my full post. I was in a crash where my carbon fork and steerer should have been smashed to pieces, but after rebuilding the headset and a careful inspection by two very experienced bike wrenches, nobody can find a thing wrong with it. What you described didn't seem to be an accident of the type I was referring to. You are talking about brute strength in response to a smash, I'm talking about twisting and possibly scoring or otherwise damaging through rotation against the tube, or damaging the rider. |
#5
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SuperSlinky wrote in message t...
George Herbert Walker said... prompts the following question: In a crash with a regular stem, the bars turn easily, pretty well eliminating or markedly reducing the damage to the brake levers and bars, and to the rider too. Additionally, there is no damage to the stem or the steel steerer. But the threadless setup is much tighter on the steerer as pointed out above, and then if the steerer is aluminum, or worse carbon... what happens? Are you and/or the bike hosed? I guess a similar question applies to carbon seatposts that get forcefully turned around while clamped. And what if you have something clamped to the seatpost, like a rack or fender or KlikFix, and it gets forcefully turned around? You must not have read my full post. I was in a crash where my carbon fork and steerer should have been smashed to pieces, but after rebuilding the headset and a careful inspection by two very experienced bike wrenches, nobody can find a thing wrong with it. What you described didn't seem to be an accident of the type I was referring to. You are talking about brute strength in response to a smash, I'm talking about twisting and possibly scoring or otherwise damaging through rotation against the tube, or damaging the rider. |
#6
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George Herbert Walker said...
What you described didn't seem to be an accident of the type I was referring to. You are talking about brute strength in response to a smash, I'm talking about twisting and possibly scoring or otherwise damaging through rotation against the tube, or damaging the rider. Stem pushed up and rotated on the carbon steerer. Some marking that doesn't quite qualify as scoring. I think you are worrying too much. The scoring needs to be worse than what you will get by twisting a seatpost for it to be a problem. Bigger problems for CF are hidden damage caused by bending or crushing. |
#7
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George Herbert Walker said...
What you described didn't seem to be an accident of the type I was referring to. You are talking about brute strength in response to a smash, I'm talking about twisting and possibly scoring or otherwise damaging through rotation against the tube, or damaging the rider. Stem pushed up and rotated on the carbon steerer. Some marking that doesn't quite qualify as scoring. I think you are worrying too much. The scoring needs to be worse than what you will get by twisting a seatpost for it to be a problem. Bigger problems for CF are hidden damage caused by bending or crushing. |
#8
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SuperSlinky wrote:
George Herbert Walker said... What you described didn't seem to be an accident of the type I was referring to. You are talking about brute strength in response to a smash, I'm talking about twisting and possibly scoring or otherwise damaging through rotation against the tube, or damaging the rider. Stem pushed up and rotated on the carbon steerer. Some marking that doesn't quite qualify as scoring. I think you are worrying too much. The scoring needs to be worse than what you will get by twisting a seatpost for it to be a problem. Bigger problems for CF are hidden damage caused by bending or crushing. The catastrophic failure mode of carbon is scary. Ask someone who's done a face plant on a set of Spynergy (sp) 4 spoke carbon wheels. Personnaly, I'd be X-raying it, or replacing it. That's the thing that bothers me about carbon, extrodinarily strong and light, but it will let go with no warning. -- Mark Wolfe Lakeside, ca http://www.wolfenet.org gpg fingerprint = 42B6 EFEB 5414 AA18 01B7 64AC EF46 F7E6 82F6 8C71 evilPetey I often think I'd get better throughput yelling at the modem. |
#9
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SuperSlinky wrote:
George Herbert Walker said... What you described didn't seem to be an accident of the type I was referring to. You are talking about brute strength in response to a smash, I'm talking about twisting and possibly scoring or otherwise damaging through rotation against the tube, or damaging the rider. Stem pushed up and rotated on the carbon steerer. Some marking that doesn't quite qualify as scoring. I think you are worrying too much. The scoring needs to be worse than what you will get by twisting a seatpost for it to be a problem. Bigger problems for CF are hidden damage caused by bending or crushing. The catastrophic failure mode of carbon is scary. Ask someone who's done a face plant on a set of Spynergy (sp) 4 spoke carbon wheels. Personnaly, I'd be X-raying it, or replacing it. That's the thing that bothers me about carbon, extrodinarily strong and light, but it will let go with no warning. -- Mark Wolfe Lakeside, ca http://www.wolfenet.org gpg fingerprint = 42B6 EFEB 5414 AA18 01B7 64AC EF46 F7E6 82F6 8C71 evilPetey I often think I'd get better throughput yelling at the modem. |
#10
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Mark Wolfe said...
The catastrophic failure mode of carbon is scary. Ask someone who's done a face plant on a set of Spynergy (sp) 4 spoke carbon wheels. Personnaly, I'd be X-raying it, or replacing it. That's the thing that bothers me about carbon, extrodinarily strong and light, but it will let go with no warning. I paid to have the bike fixed up to make it ridable. I really admire the fork's apparent indestructibility, but I do wonder if one day it will disintegrate under me. It is a backup bike now, and I'm a little too scared to do anything high speed on it. |
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