Is a crack in the carbon faring on an Aero (HED) structurally a problem?
10-14-10, 02:33 PM
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Is a crack in the carbon faring on an Aero (HED) structurally a problem?
I have a Team Fuji that I'm working on cleaning up and flipping. Instead of dealing with cleaning up the Araya aero tubular wheel and buying a new tube/tire. I decided to get an aero clincher.
I have the opportunity to purchase a 650C, HED carbon wheel which has a smooth hub/bearings and is true, but there is a crack in the carbon faring.
!B5Q7z!!!mk~$(KGrHqJ,!hYEyrrVkKNYBMs7fd2Gug~~_12..JPG
I have heard that the carbon is not a structural component, so it should have no effect on performance. At least, that's what I hear. Is this true or false? Any other comments welcome.
I have the opportunity to purchase a 650C, HED carbon wheel which has a smooth hub/bearings and is true, but there is a crack in the carbon faring.
!B5Q7z!!!mk~$(KGrHqJ,!hYEyrrVkKNYBMs7fd2Gug~~_12..JPG
I have heard that the carbon is not a structural component, so it should have no effect on performance. At least, that's what I hear. Is this true or false? Any other comments welcome.
10-14-10, 03:38 PM
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10-14-10, 03:41 PM
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10-14-10, 03:47 PM
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Carbon Fiber has a failure mode best described as "An explosion of little sticks". It will do so with the slightest provocation, Carbon Fiber Bikes have been known to explode upon simply having the shipping box jostled a little to hard.
UPS requires all Carbon Fiber parts to be shipped with a Haz-Mat label because of this risk.
Be Sure you factor that into your shipping costs.
UPS requires all Carbon Fiber parts to be shipped with a Haz-Mat label because of this risk.
Be Sure you factor that into your shipping costs.
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10-14-10, 04:19 PM
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Carbon Fiber has a failure mode best described as "An explosion of little sticks". It will do so with the slightest provocation, Carbon Fiber Bikes have been known to explode upon simply having the shipping box jostled a little to hard.
UPS requires all Carbon Fiber parts to be shipped with a Haz-Mat label because of this risk.
Be Sure you factor that into your shipping costs.
UPS requires all Carbon Fiber parts to be shipped with a Haz-Mat label because of this risk.
Be Sure you factor that into your shipping costs.
It's not the explosion that is so bad, but the resulting fire. Some research has shown that the Hindenburg may have been an early, secret Nazi carbon fiber related project that went horribly wrong.
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10-14-10, 04:21 PM
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From what I remember, these were basically a regular aluminum rim, spoke nipples seated in the aluminum. THe CF is completely non-structural. If you are concerned about it cracking further or falling apart, overlay the crack with a layer of fiberglass. Once wetted out, the fibreglass will be transparent and give it the faring bit of strength with only a slight bulge.
Dont want to mess with fibreglass? Just cover the crack over with a sticker or some duct tape.
Dont want to mess with fibreglass? Just cover the crack over with a sticker or some duct tape.
10-14-10, 04:33 PM
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From what I remember, these were basically a regular aluminum rim, spoke nipples seated in the aluminum. THe CF is completely non-structural. If you are concerned about it cracking further or falling apart, overlay the crack with a layer of fiberglass. Once wetted out, the fibreglass will be transparent and give it the faring bit of strength with only a slight bulge.
Dont want to mess with fibreglass? Just cover the crack over with a sticker or some duct tape.
Dont want to mess with fibreglass? Just cover the crack over with a sticker or some duct tape.
10-14-10, 05:02 PM
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10-14-10, 05:13 PM
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To continue the trend...
- the tacoma narrows bridge was made of carbon fiber
- the titanic had a carbon fiber hull (the iceberg was actually a hunk of chromoly)
- ....
In all seriousness, carbon fiber is ok
. Not my choice, but I try not to hate on anyone that rides it.
10-14-10, 05:13 PM
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10-14-10, 05:27 PM
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aka: Mike J.
My concern would be what if the non-structural c/f decided to separate and come into contact with a structural component on the bike? Could be a nasty encounter and wouldn't be worth the risk to me. How about just ripping the c/f off of that rim and running it naked?
10-14-10, 10:44 PM
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Carbon Fiber has a failure mode best described as "An explosion of little sticks". It will do so with the slightest provocation, Carbon Fiber Bikes have been known to explode upon simply having the shipping box jostled a little to hard.
UPS requires all Carbon Fiber parts to be shipped with a Haz-Mat label because of this risk.
Be Sure you factor that into your shipping costs.
UPS requires all Carbon Fiber parts to be shipped with a Haz-Mat label because of this risk.
Be Sure you factor that into your shipping costs.
Personally, I would not do any repair on this wheel as it would increase the rim's weight causing the carbon fiber to break and attack you out of spite.
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