27.5

Manipulating the knob pattern of the wet-weather Storm DH, we've created a moto-inspired knob pattern designed for moist and dry conditions alike. Knurled knob tops enhance traction on roots, rocks, logs, off-camber drops…this tire tames them all. - Casing: 60 TPI, Dual Ply - Bead: wire - Compound: Base 70a / Top 42a - Pinch Protection: Butyl Inserts at bead - 650b x 2.5, psi 25-50, approximate weight 1290g

Specialized's 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 its Flak Jacket flat protection, you'll be sure to hit it all with confidence and control. - Casing: 30 TPI - Bead: Wire - Compound: 70a - Flat Protection: Flak Jacket - 26 x 2.0"; psi 35-65; approximate weight 880g - 650b x 2.0"; psi 35-65; approximate weight 960g - 29 x 2.0"; psi 35-65; approximate weight 1000g