Specialized Hardrock'r Tire 650b x 2.0 inch (52-584mm) dadday Crank Length (mm): 155

Crank Length (mm): 155

Combines a 15 tooth sprocket with sidewalls to keep the chain in place on rough roads

Knit in Vietnam: 55% Merino Wool

four different bleed blocks

7 or 8 speed drivetrains

Specialized Hardrock'r Tire 650b x 2.0 inch (52-584mm) dadday Crank Length (mm): 155The Hardrock'R is a long lasting tire with an aggressive, yet smooth rolling, tread with multi directional knobs that are sure to improve traction and cornering over mixed terrain. And with the added benefit of Flak Jacket flat protection, you'll be sure to hit it all with confidence and control. Specifications: Casing: 30 TPI Bead: Wire Compound: 70a Flat Protection: Flak Jacket 27. 5 x 2. 0", psi 35 65, approximate weight 960g