Last year during the Kings of New England race series, I noticed that the front of my bike was making a weird clunking noise whenever I went over a bump. I thought it was a loose headset. Until, after two days of racing, during the third day I got a flat on my front wheel and found that one of my front track nuts wasn't even finger-tight. The whole front wheel was only held on by one nut for 2.5 days. No wreck, but I thanked my lucky stars I never dropped that wheel in the 100 times I picked up the front.