I need some advice. My wife and I were doing a ride yesterday in Petaluma. There was a short downhill stretch with a concrete bridge over a creek. I hit the bottom just before the bridge at about 35. Turns out there was about an inch or more of difference in height at the bridge transition and my rims slammed into this hard enough to hear. I ended up with both rims dented, out of round slightly flattened at the point of impact and the brake surface at the point of impact is warped out a bit so that when I brake, it makes a thump sound each time this goes around. Fortunately, I was using my commuter bike with cheap rims (Matrix Aurora originally from my wife's Trek). Are these repairable or worth repairing or do I just need to get a new wheelset?
Remove the tire. Take an adjustable wrench and set the width using a healthy portion of the rim such that you can just slide it along the straight portions. When you get to the damaged section begin to rock the wrench back and forth while moving along the rim. Re-true. If you can get the tire to seat, and the brakes not to pulsate, rock on.
In the future, inflate your tires to a higher pressure.
Despite the possibility of being able to straighten the rims, I would recommend replacing them. Once aluminium is bent it loses structural strength, so even if you manage to straighten the rims you'll be retrueing them regularly and probably have spoke breakages as well.
Enthalpic: I did end up trying to straighten the rims which for the most part seemed successful. Brake still pulsates slightly in the front and the rim is out of round, but the brake pad still stays on the brake surface of the rim. I had the pressure at 100+. Not sure how much higher I should have gone (I'm also fairly light at 140lbs).
62vette and the beef: This was my main concern with a repair. I'll ride on the repair until I can find a suitable replacement on craigslist. If it gets too sketchy on these rims, I'll ride my weekend bike in to work instead.