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Rims: Ceramic vs.

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Old 08-03-08, 04:57 PM
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Withnil
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Rims: Ceramic vs.

Picking up a rim to build up a front wheel. I use a brake on the front so my braking surface is a concern. If the braking surface will be colored (black) is it better to have a 2 coating ceramic or the surface to be anodized?
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Old 08-03-08, 05:04 PM
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This thread was marginally helpful:

http://www.bikeforums.net/showthread...hlight=ceramic

So anodized rims eventually are cleaned over by brake pads so do ceramic coated rims keep their color longer?
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Old 08-03-08, 05:17 PM
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And here's more specific info on what I was looking for:

Mavic offers several finishes on their Open Pro rims. I own several sets of Open Pros. One is black with machined rims, one has the CD finish, and I have one front wheel with the ceramic coating on the braking surface which I bought because I thought it would have better stopping power. The CD rim is anodized with a ceramic coating over the entire rim, inside and out. The braking surface is machined before the coating is applied so the brown coating is on the braking surface, too. The coating is very hard, and Mavic's literature says it does help to dissipate heat. With any wheel, if the brakes pads have imbedded abrasive materials (impurities in the rubber or sand/dirt from riding in the rain) the braking surface will get scratched. I think that this CD coating on the braking surface would be less susceptible to scratching because it's harder than then base metal. However, when scratched it is very visible because the coating is a diffrent color than the underlying metal. The Open Pro CD with Ceramic is coated the same way as are the normal CDs, but has another, very rough, ceramic coating applied to the braking surface. It makes the braking surface feel like sandpaper. This coating is applied to increase the coefficient of friction when wet. I would think that it would be less susceptible to scratches from impurities imbedded in the pads because of its hardness and extra thickness. But, it can still be scratched (one of mine has a radial scratch from banging it into something while handling the wheel in the garage). I have read that once scratched the ceramic application is susceptible to flaking off. Haven't experienced that yet. They do stop better when dry (normally don't ride in the rain in San Diego). The biggest disadvantage to the ceramic coating is that it is so abrasive it EATS BRAKE PADS at an UNBELIEVABLE rate! Koolstop makes green pads for ceramics which is better, but still goes fast. I am currently running a set of Shimano pads from an old model of cantilever brakes which are very hard. The hardness somewhat compromises the increased stopping power, but at least they will last more than 500 miles! Would recommend the CD coating, but stay away from the ceramic coating unless riding in the rain.
Amazing what you learn when no one responds!
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Old 08-03-08, 05:41 PM
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Originally Posted by Withnil View Post
And here's more specific info on what I was looking for:
Amazing what you learn when no one responds!
thread isn't even an hour old, and you found what you were looking for thru a search.
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Old 08-03-08, 05:49 PM
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I bought ceramics for rain riding. they make a wonderful difference in the rain. if you're worrying about it being color coordinated, they are not 100% black so you may not want them then. I would say you should get the ceramics for when it does rain though. make sure you only get the green pads though because they will go thhrough regular brake pads in no time
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Old 08-03-08, 05:51 PM
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I did a very specific web search with an excellent search engine and found info from one person. I would still love to hear everyone's input.
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Old 08-03-08, 05:54 PM
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what rim is that? It looks to be slightly more aero (maybe?) than the Open Pro I'm looking at.
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Old 08-03-08, 05:56 PM
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it's an open pro. as far as I know only mavic makes ceramic rims for road rims
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Old 08-03-08, 06:11 PM
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Originally Posted by Gyeswho View Post
it's an open pro. as far as I know only mavic makes ceramic rims for road rims
I have them on my 26" SS.
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Old 08-03-08, 06:24 PM
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http://yarchive.net/bike/rims.html

Ctrl+f ceramic
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Old 08-03-08, 07:47 PM
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Originally Posted by Soil_Sampler View Post
I have them on my 26" SS.
my bad, I meant for 700c "road" rims
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