The Alenza Sport A/S from Bridgestone is a premium ultra-high-performance all-season tire that's used as original equipment on select Mercedes-Benz vehicles. The Alenza Sport A/S features circumferential and lateral grooves to evacuate water and resist hydroplaning, a long-wearing tread formulation, low-profile sidewall, and a tread pitch that's computer tuned to resist hydroplaning. Additionally, the Alenza Sport A/S is covered by a 40,000 mile limited manufacturer tread life.