A new compound with increased silica improves grip on wet surfaces. The structure of the tire and tread pattern design filter all different road conditions and deliver a more comfortable and smooth ride. Tubeless (TL). Blackwall. An improved tread pattern with crossing elements absorbs and distributes braking forces to reduce the breaking distance. Born from Pirelli's sport touring product, the Angel GT, for urban commuting. Damping dots within the tread modify the stiffness of the ride and absorb ground irregularities and vibrations.