I have a rim (front wheel, a Sun 27" M-13II) which was made poorly. The two sections don't line up well at the joint. As a result one edge sticks up above the other and on one side of the rim it catches on the brake pad. I've tried polishing it down and have made it better but it still isn't perfect. Even after I've cleaned the surface it seems to get worse as I ride, as if pad material were building up on the braking surface.
Bombing down switchbacks at 30+ mph on Cadillac Mt. in Acadia Natl Park this past week made me realize how problematic the seriously thumping front brake could be. I gotta' fix this!
I can try polishing it more with special emphasis on getting the surface smooth as opposed to just lining up the two surfaces on opposite sides of the joint. Of course it will end with a slight depression in the surface, even more than it already has. Or I can simply buy a new rim and rebuild the wheel.
Have any of you ever tackled a problem like this? Is it possible to fix, or should I just get a new rim and be done with it? (Yes, I can build the wheel.)
I thought about whether to post this in C&V or mechanics, decided it was a virtually-old rim on a truly old bike, so C&V it should be.
Last year I posted a thread about the trouble I had getting new wheels built. I'm now down to this last unsolved problem. For various reasons I can't go back to the store who sold me this rim and who built not what I wanted and who screwed up a few other features. Long story, not worth repeating. But I'm just going to build all my own wheels from now on.
And for what it's worth - two loops around the Park Loop Road plus one run up and down Cadillac - 45.6 miles, 3440ft elevation gain. Got lots of attention for the "beautiful old bike", my Raleigh Gran Sport.
Mileage + age of bike + age of rider + elevation gain (in 100's of ft) = 180!