Some here scared that spikes would fly out, and behind them the air would poison. As a result of two seasons, 3-4 spikes flew out of 4 wheels, and the pressure is in place. Has pros: Thick tread, almost off-road - when there are no spikes, I will use it as a summer one for the mountains)) Rows through snow, ice and mud just fine. Some cons: Noise is not a disadvantage - this is the reverse side of a thick tread. At high speeds, handling deteriorates - and it’s not good to drive in the winter.