Yes. I have a set of wheels with stock tires with stainless hex heads screwed into every lug. 2-3 inches of ice on the road and I still had to get to the yard to fire up the wrecker to pull all the 4x4 idiots out of the ditches. I've had several people actually crash because their brains refused to register what their eyes were seeing until too late. This seems especially common with middle-aged yuppie males. I always feel sorry for them--they have to explain crashing while avoiding a motorcycle riding down an ice-covered road to their insurance agent.