How many I use, but there were no complaints about the rubber. I am using the third season, there are no complaints about the quality. In the rain, handling does not change, there is no aquaplaning, I have never noticed drifts from the track at speed. When hooking the curb in rainy weather, it can spin - a fact. Rubber is quiet, wears out not quickly, which is a big plus for its cost. I'm satisfied, it's a worthy choice.