Whether you’re weaving your way through a hairpin-riddled downhill course or a pedestrian-infested urban jungle, the Orangatang 4President is your candidate of choice. Diameter: 70mm Width: 53mm Contact Patch: 53mm Durometers: 80a, 83a, 86a Bearing Seat: Offset Formula: Happy Thane Core: high-strength, high-stiffness, heat-resistant urethane