When spring weather turns dark and wet and you still want to race, the Vredestein Fortezza Sensor All Weather clincher tires should be the only tires on your wheels. The Sensor uses three different densities of rubber to minimize rolling resistance and maximize grip. This compound is called Tri Comp and has been proven through Vredestein's experience with automobile tires. Additionally, the added Curve Control improves durability while taking corners hard. In addition to the Tri Comp rubber, a layer of polyamide was added underneath the center tread to increase puncture protection.