Have you ever see one fail like this?
#126
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Let's backtrack and double down on the ignorance by making this about prestige because we can't be bothered to read, but I guess we shouldn't be listening to someone who would be willing to change out parts on a whim based on anecdotal evidence on the internet
#127
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I was being sarcastic. If I was serious I don't think I'd be riding on a carbon wheel set or carbon fork after all the exploding carbon parts I've seen on the interwebz. Seriously you thinking Taiwan is better than China is ignorant. Giant for one makes a lot of their stuff in China.
#128
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How is your cousin? Hopefully recovering well. I sure picked up the wire in the road I ran over, couldn't see it but sure heard it. And I don't run over the small branches either. So thank you for posting this, I didn't have to learn the hard way.
#129
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#130
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Darn tootin. One of my bikes is rocking a 315g Time fork I scored for nix cause it had evidently come off a roof rack; one of the ally dropouts was bent pretty bad.
After riding it for a couple of years I think it's fair to say there's a bigger question mark over the dropout than the blades...
After riding it for a couple of years I think it's fair to say there's a bigger question mark over the dropout than the blades...
#131
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Aluminium, carbon, steel, titanium: there is no way a plastic reflector would cause the break.
But the material being aluminium makes more sense: incorrect heat treatment with a cold spot at the height of the break would cause a discontinuity in the crystaline structure of the metal, creating a a weak spot prone to fracture. It makes sense that the fork broke at the same height on both sides, indicating fatigue along this weak spot finally gave way.
Also notice that broken steel forks in other images are not completely severed. This is due to the resilent quality of steel, completely lacking in aluminium.
I really don't get it why someone would use an aluminium fork instead of good quality steel or even CF, just because it is much cheaper to make for the manufacturer.
But the material being aluminium makes more sense: incorrect heat treatment with a cold spot at the height of the break would cause a discontinuity in the crystaline structure of the metal, creating a a weak spot prone to fracture. It makes sense that the fork broke at the same height on both sides, indicating fatigue along this weak spot finally gave way.
Also notice that broken steel forks in other images are not completely severed. This is due to the resilent quality of steel, completely lacking in aluminium.
I really don't get it why someone would use an aluminium fork instead of good quality steel or even CF, just because it is much cheaper to make for the manufacturer.
Aluminum is not as resilient as high strength steel, although low strength aluminum is as ductile as low strength steel. But high strength aluminum has quite a bit of resilience/spring to it, ask anyone who's tried to bend or form a piece of 6061-T6. But, even high strength aluminum would make poor springs (or a bike frame with a lot of flex) because it has poor fatigue strength, it doesn't like to be repeatedly flexed. But it can make good bike frames and forks if you use its lower density to allow larger geometry (big tubes) in order to make it rigid enough to last in fatigue. Good for race frames, but worse ride.
#132
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I was being sarcastic. If I was serious I don't think I'd be riding on a carbon wheel set or carbon fork after all the exploding carbon parts I've seen on the interwebz. Seriously you thinking Taiwan is better than China is ignorant. Giant for one makes a lot of their stuff in China.
Sure, you can get excellent stuff from China but I would still prefer Taiwan, especially if if wasn't a "name brand".
#134
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even high strength aluminum would make poor springs (or a bike frame with a lot of flex) because it has poor fatigue strength, it doesn't like to be repeatedly flexed. But it can make good bike frames and forks if you use its lower density to allow larger geometry (big tubes) in order to make it rigid enough to last in fatigue. Good for race frames, but worse ride.
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#135
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Recovering
She needed some surgery to repair some facial bones, and she's done riding for a while, sorry to say.
#136
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You can have a great ride on a really stiff frame, if it's compact enough... Although my Roubaix is carbon, it only had a really plush ride after I put a carbon post on it. Pretty firm with a solid aluminum post, even at 27.2. I guess that's why later CAADs have a 25mm post.
#137
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I'm a retrogrouch, I like horizontal top tubes, not compact frames. Not just for looks, a long seatpost puts more bending moment into the frame. My 20" wheel folder has an ultra-ultra-long seatpost, and as a result, did develop a crack in the seat tube at the seatpost clamp. It sounds like you are having the carbon seatpost flex aft to absorb bumps, not sure I'd want that as it changes the seat angle a lot. My touring bike with a stiff aluminum frame has a slightly compacted frame in order to use a shock-absorbing seat post (that telescopes vertically with a spring inside), that is good design rationale and it makes a big difference in ride.
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#139
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A telescopic seatpost? Lol. Commuting forum is that way.
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Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
#140
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This was posted a few years ago.
At this point of the crash, one can see some road debris (tire iron?) that was picked up by the wheel, and it was all over.
One might expect that one would simply ride over the debris, but another vehicle or bike may have made it bounce some.
Near the end there is a picture of the front wheel and broken fork. Fork broken just at the inner edge of the rim, almost exactly like the OP's case. In the clip, the rim is out of round, but several spokes appear to be pulled out of the rim, similar to what happened to the OP.
At this point of the crash, one can see some road debris (tire iron?) that was picked up by the wheel, and it was all over.
One might expect that one would simply ride over the debris, but another vehicle or bike may have made it bounce some.
Near the end there is a picture of the front wheel and broken fork. Fork broken just at the inner edge of the rim, almost exactly like the OP's case. In the clip, the rim is out of round, but several spokes appear to be pulled out of the rim, similar to what happened to the OP.
#142
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Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
#144
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A telescoping post does change height, but you set it up so that when statically loaded (1G), the height is correct for you.
#145
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Is anybody here seriously contemplating an ugly, heavy, telescoping post?
The flex of a carbon post is an exponentially more elegant solution to ride comfort.
The flex of a carbon post is an exponentially more elegant solution to ride comfort.
__________________
Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list
Sheldon Brown's bike info ~~~ Park Tools repair help
Half-step triple, using double gear ~~~ 6400 STI rebuild walkthrough ~~~ Want 8/9/10s @126mm OLD? OCR. ~~~ Shimano cassette body overhaul ~~~ Ergopower Escape wear repair ~~~ PSA: drivetrain wear
List of US/Canada bike co-ops ~~~ Global list