The Rear Smoke Classic&';s arrow shaped tread will never steer you wrong. The Gold Standard of MTB tire design. Rear tire with 3D multi-angle knobs designed for cornering traction 3D Knobs; positioned on the tire sides these knobs peform multi-directionally to maintain traction while cornering Flat Protection: Tread ISO Diameter: 559 / 26" MTN TPI: 60 Labeled Size: 26 x 2.10 PSI: 65 Color: Black ISO Width (mm): 53 Defined Color: Black Tire Intended Use: Mountain Weight: 620 Tire Type: Clincher Tire Diameter: 26" Tire Bead: Folding