This semi-slick tire borrows its tread design from the trail version of the Rekon, but with smaller and shorter knobs. Use it as a rear tire paired with a more aggressive front tread, or front and rear for short track racing. SPECS: Labeled Size: 27.5 x 2.25 ISO Width (mm): 57 Flat Protection: Sidewall ISO Diameter: 584 / 650b / 27.5" Tire Intended Use: Mountain Tire Type: Tubeless Ready Clincher TPI: 120 Tire Bead: Folding Tire Diameter: 27.5"