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#11
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Wheel build
wrote:
Isn't mileage to failure perhaps a more meaningful measure of a wheel's durability than what the failure mode is? I'd say it's pound-miles. But wheel durability is a relative thing that depends on where you live. Despite assertions, not everybody's wheels will eventually wear out their sidewalls if ridden far enough-- that us largely a factor of local weather and soil conditions. I've ridden lots of miles in two places-- Austin and Seattle. Austin has limestone-based soil, and gets almost all its rain in the form of Biblical thundershowers (which purge the streets clean of practically everything). If you don't want to ride in the rain, you can usually just wait it out. As a result, rims here last long enough to die from something besides sidewall wear. I have a front wheel with about 35,000 miles on it that still has its hard anodizing almost entirely intact. Only riding in the mud causes folks here to have much sidewall wear. In Seattle, the soil is granitic, and the rain comes in the form of an eight-month-long session of drizzle (though the total annual precipitation is about the same as Austin's). Everything gets coated with a film of filth, not washed clean. You have to ride in it, if you want to ride outside the summer months. So folks who do ride a lot of miles inevitably wear out their rims if they use rim brakes. (They also trash their axle bearings early and often.) I didn't personally lose any rims to abrasion, but I use heavy rims-- and I spread out my miles among approximately 20 bikes, some of them hub- braked, during the almost six years I lived there. Susceptibility to spoke bed cracking will be a bigger concern to folks in a place like Austin than those in a place like Seattle, simply because it's more likely to be the thing that takes their wheels out of service in an expensive way. Chalo |
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#12
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Wheel build
On 2 Sep 2007 22:52:27 GMT, Robert Lorenzini
wrote: I have a extra pair of DA 7801's with cracked rims and I was wondering if I should just get them fixed under warranty or build them with a different rim, clincher or sewup. Just looking for opinions on what rims other than DA will make me look better. My personal opinion is that the manufacturers should be held responsible for putting out crap; therefore, if the wheels are still under warranty, I'd make them pay to fix the wheels. Otherwise, you've got lots of opinions on how to proceed. Pat Email address works as is. |
#13
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Wheel build
On Sep 3, 8:14 am, "
wrote: On Sep 3, 8:00 am, "Qui si parla Campagnolo-www.vecchios.com" wrote: On Sep 2, 4:52 pm, Robert Lorenzini wrote: I have a extra pair of DA 7801's with cracked rims and I was wondering if I should just get them fixed under warranty or build them with a different rim, clincher or sewup. Just looking for opinions on what rims other than DA will make me look better. Bob Any wheel w/o cracked rims will make you look better than the guy stranded on the side of the road. Warranty these things, ebay them and have a good wheelbuilder make you a set of wheels that won't 'crack rims'. If ya gotta look good, use colored rims from Velocity- What's so bad about cracked spoke holes in a rim? I mean, sure, a crack means the wheel has failed. But the way I look at it, that's a pretty benign failure mode. What if rims *never* cracked, then what's the next failure mode? Blown out sidewalls? That seems more dangerous than spoke hole cracks. One caused by poor design, in this case by shimano and one caused by riding your bicycle. It may be benign, but it should not happen on a well designed and built wheel. Checking the sidewalls of your rims in the normal course of preflighting your bike will prevent 'blown out sidewalls'. Isn't mileage to failure perhaps a more meaningful measure of a wheel's durability than what the failure mode is? |
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