I've had a set cut down and under a commercial trailer for years! 10 years it's been hauling backhoes, skid loaders, cars, small dozers, tons of brick and concreate and gavel. For 10 years It's stopped at weigh stations, never a ticket for anything other than wireing on it. The 30ft tandom international that pulled it beat the hell out of it and it was in two prior accedents. So I'm thinking there fine, just keep them greased.