Varying shaped block and rectangular tread alternate to provide low rolling resistance but excellent bite in grass, gravel and mud Varying shaped block and rectangular tread alternate to provide low rolling resistance but excellent bite in grass, gravel and mud Features the all-weather type ZSG Cross Compound for superior grip in both wet and dry conditions, and CG Tread Pattern for a light riding feel and superior grip Complies with UCI (Union Cycliste Internationale) rules TR - Tubeless compatible casing, sealant required