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Whats wrong with my rims? (Shimano 550)

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Whats wrong with my rims? (Shimano 550)

Old 02-15-06, 09:37 PM
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bike756
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Whats wrong with my rims? (Shimano 550)

I only have a couple hundred miles on my new bike, but the rims on my wheels(shimano 550) seem to be wearing out already. There are little raised bumps on the braking surface. Is this covered on the waranty? Has anyone else had this problem? The bike is a felt F4C

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Old 02-15-06, 09:41 PM
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im no expert, but that just looks like prake pad deposits? have you tried to slean them up with some windex/window cleaner?
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Old 02-15-06, 09:46 PM
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Originally Posted by HDTVKSS
im no expert, but that just looks like prake pad deposits? have you tried to slean them up with some windex/window cleaner?

hes right, thats hot rubber that cools and welds itself to the rim, I use a razor blade and some sort of household cleaner that will not harm aluminum.

Good Luck
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Old 02-15-06, 09:47 PM
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Definately not brake pad deposits. They are little iregularities in the metal. It feels like there is sand stuck to the rim when I brake.
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Old 02-15-06, 09:47 PM
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Looks kinda normal from what I can tell. I'd recommend giving the braking surface a good clean with denatured alocohol and a scotchbrite pad (or some other mildly abrasive thing).

Once you've done that, replace the brake pads with some KoolStop pads. In my experience, they're the best pad out there for minimizing rim wear, and provide superior braking power while they're at it.
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Old 02-15-06, 09:50 PM
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Originally Posted by bike756
Definately not brake pad deposits. They are little iregularities in the metal. It feels like there is sand stuck to the rim when I brake.
Any chunks of metal in your brake pads?

I still say try a good braking surface cleaning and some Kool-Stops.
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Old 02-15-06, 09:56 PM
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I just tried paint thinner on the rims. it gets all the dirt and rubber off, but it just polishes the bumps.

They are shiny and wont come off with a razor blade.
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Old 02-15-06, 10:13 PM
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Do you ride on sandy roads, wet conditions, or in the snow? Road debri/sand can do this to rims. I tossed a set of rims one winter a few years ago the rim seem to be grooved at the end of the season.
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Old 02-15-06, 10:18 PM
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Sadly, I must tell you what no one else will: your rims have herpes.

Seriously, I suggest you take them back NOW before any warranty has expired. Get a professional opinion. We're all country doctors here.
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Old 02-15-06, 10:18 PM
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I rode about ten miles in the rain once but that couldn't do that to rims.

Maybe it is a factory defect that I didn't notice untill after I rode it for a while?
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Old 02-15-06, 10:31 PM
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Originally Posted by bike756
Maybe it is a factory defect that I didn't notice untill after I rode it for a while?
Could be. Take them to thy dealer.

Originally Posted by bike756
I rode about ten miles in the rain once but that couldn't do that to rims.
Given that you seem sure that these bumps are part of the braking surface, and not stuck to the braking surface, it probably wasn't caused by rain.

You may be surprised at what rain riding will do to brake pads and braking surfaces, though. A lot of debris gets kicked up in the rain and caught in the pads, which ain't so good for the rims! I had a set of Shimano pads with only 100 miles on them completely wear out during one 12 mile ride home from work!
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Old 02-15-06, 11:51 PM
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I dunno if this would be the right suggestion, but can you fine sand it. like how they buff aluminum parts. use 900 or higher grade sand paper. but of course clean it out first then buff it to bring the surface back to a level. and inspect your brake pads.
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Old 02-16-06, 02:30 AM
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This is unfortunately common but its not a fault of the rim. Its the brakepads. They must be cheap and hard. If you've ever read or heard the term "rim friendly" brake pads well what you have is an example of "rim unfriendly" pad material.

Change your pads pronto and clean the rim surface with steel wool is my suggestion although you could try for a warranty replacement I believe that they will duck and weave. You could try your luck but in future its best to replace cheap pads for quality "rim friendly" materials before you even roll out of the shop.

EDIT: Actualy I would be taking to the rims with some fine wet&dry sandpaper and a sanding block. Kool Stop pads are the reccomended choice.

Regards, Anthony

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