I have always though the belt rule was a little much but I think they probably consider the worst case scenario for belt life. I was told the belt rule was put in place after Lee Shepherd died and that was attributed to belt failure. I had a chassis tech guy tell me that most of NHRA's safety rules are put in place as the result of an injury or death after a crash. The last time I replaced my belts I did find a place in one that was damaged from abrasion that couldn't be seen with the belts in the car so now I think maybe it's not such a bad idea. I've been on my roof in a race car once and it really makes you appreciate all of this bothersome safety crap :shock: .