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#1
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Repairing a scratched rim?
I took a spill on December 21. Luckily, I was close to home, and was
able to ride. However, I noticed that there was a noise when I applied the rear brake. When I got home and examined the wheel, I didn't see anything wrong. But when I checked more closely yesterday, I noticed that I had scratched the rim on the braking surface (on the drive side of the rim). It isn't a very deep scratch, and it is only about 3/4 inch long. I'm wondering whether I might be able to sand the scratch down, so that it doesn't tear up the brake pad. Or, could I just use it, and maybe have the brake pad smooth out the scratch, at the cost of having to replace the pad a couple of time. Or, must I replace the rim? What are your opinions / suggestions? The bike is a Trek 5200 with Bontrager Race Lite wheels. I replaced the Shimano Ultegra components with Campy Record, and Trek traded the Shimano hub wheels for Campy compatible ones at no cost. |
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#2
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Repairing a scratched rim?
"Colin Campbell" wrote: (clip)I'm wondering whether I might be able to sand the scratch down, so that it doesn't tear up the brake pad. (clip) ^^^^^^^^^^^^^^^ I would use a flat sanding block, so you remove only the raised metal. You don't want to create a valley there, or you will probably feel it when braking. If it continues to wear the pad on that side excessively, the next step would be to fill it with Bondo, Liquid Steel or epoxy. |
#3
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Repairing a scratched rim?
Colin Campbell wrote: When I got home and examined the wheel, I didn't see anything wrong. But when I checked more closely yesterday, I noticed that I had scratched the rim on the braking surface (on the drive side of the rim). It isn't a very deep scratch, and it is only about 3/4 inch long. My solution is to use a needle file to remove any burr on the scratch. This offers more control and is quicker than sanding. You don't want to remove the scratch completely. Just take off the high spots so the pad will slide smoothly on the rim again. |
#4
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Repairing a scratched rim?
Colin Campbell wrote:
I took a spill on December 21. Luckily, I was close to home, and was able to ride. However, I noticed that there was a noise when I applied the rear brake. When I got home and examined the wheel, I didn't see anything wrong. But when I checked more closely yesterday, I noticed that I had scratched the rim on the braking surface (on the drive side of the rim). It isn't a very deep scratch, and it is only about 3/4 inch long. I'm wondering whether I might be able to sand the scratch down, so that it doesn't tear up the brake pad. Or, could I just use it, and maybe have the brake pad smooth out the scratch, at the cost of having to replace the pad a couple of time. Or, must I replace the rim? as stated by others, remove the high spots only. a file is best since you don't want to cut below the machined face of the rim as a general abrasive would do. then ride. the rim will wear out through use eventually anyway, so replace it then, not now. What are your opinions / suggestions? The bike is a Trek 5200 with Bontrager Race Lite wheels. I replaced the Shimano Ultegra components with Campy Record, and Trek traded the Shimano hub wheels for Campy compatible ones at no cost. |
#5
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Repairing a scratched rim?
Leo Lichtman wrote:
"Colin Campbell" wrote: (clip)I'm wondering whether I might be able to sand the scratch down, so that it doesn't tear up the brake pad. (clip) ^^^^^^^^^^^^^^^ I would use a flat sanding block, so you remove only the raised metal. You don't want to create a valley there, or you will probably feel it when braking. If it continues to wear the pad on that side excessively, the next step would be to fill it with Bondo, Liquid Steel or epoxy. I was advised to use steel wool on a scratch where a sliver of metal had gotten fixed into a brake pad of mine. Now I use steel wool sparingly for situations like that. I sure would not take down any more metal than I had to, whatever I did. There's a lot of construction where I have to ride, so getting debris in and on my brake pads is a pretty common thing for me. |
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