I have 2 sno runners with appr. 3-5 hrs on each until one of the old goats wiped out and broke some bones in his foot. But there was no damage done what so ever to the sno runner. And as I say I do have two of them. any way I would like to here what you no about these dam things because until I picked them up the other day I had never seen anythig like this before. P.S. 99%MINTCONDITION RUSS