I left for 2 seasons, for the first I drove 11300 km, 2 spikes flew out from the front wheels. For the second season, the tires changed places (front-back), drove 10200 km, 3 spikes flew out from the front wheels, and 20 spikes from the rear wheels, which very strange, because usually the spikes fly out due to slipping. Overall, I'm happy with the tires.See full review