I have a bent knuckle on my front wheel assembly -- the knuckle that the brake caliper is bolted to. Trouble is, I have no idea how it happened. We had been on the highway for 300 miles; a clean, dry, smooth road. Had just pulled out from a rest stop and heard scraping from the wheel. We hit nothing, no pothole, curb, pole. We were 5 miles from a Honda dealer and they pulled the tire and there was the bent knuckle that was canting the brake assembly and causing it to scrape on the disc. I will have to replace the assembly but I would really like to know how this could have happened when I do so. This is a big, heavy duty hunk of steel. It would have to have been hit really hard and heavy to bend like this. Is it possible to have hit a pothole or something several hundred miles or several days before this scraping appeared, and have this problem just pop up later?