The Schwalbe Nobby Nic combines Triple compound and the super-fast carcass used by the Racing Ralph providing divine grip and speed for the trails. Uses an extremely elastic tread base for very low rolling resistance, and a stable center and extra shoulder grip for performance and cornering Utilizes the super-fast carcass of the Racing Ralph Specifications: Labeled Size: 27.5 x 2.6 Color: Black ISO Width (mm): 66 ISO Diameter: 584 / 650b / 27.5 Flat Protection: Tread and Sidewall Tire Intended Use: Mountain Defined Color: Black