Faced with the extreme challenges of today‘s XC tracks, we completely revised Racing Ralph. The result is a very fast and versatile XC profile, specially developed for the rear wheel. FEATURES: Numerous grip edges in the tread center for super traction and excellent acceleration. Distinct shoulder studs for excellent lateral grip. Good rolling properties and extremely quiet. SPECS: Color: Black ISO Width (mm): 57 Flat Protection: Sidewall ISO Diameter: 622 / Road / 29" Tire Intended Use: Mountain Tire Type: Tubeless Ready Clincher Tire Bead: Folding Tire Diameter: 29"