650B

The Ground Control Sport uses an extremely versatile tread pattern which can be used from cross country race to trail, it rolls fast with exceptional amounts of confidence and grip. Our Block-In-Block design uses a taller adaptable inner block to pierce the ground and claw for traction. The larger outer structure supports the inner block for additional speed, traction, support and stable handling. - Casing: 60 TPI - Bead: Wire.

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

The Purgatory GRID 2Bliss Ready tire is the standard-bearer for light trail tire performance. The new, completely redesigned tread pattern features square lugs that bite in on soft soil, while still providing support on hard-packed ground. Additionally, flexible center sipes fold out under braking force for increased ground contact and adhesion. For further peace of mind, the GRID casing provides the utmost in cut and flat protection at the sidewalls. And, to top it all off, our proprietary GRIPTON compound helps make this the perfect choice for epic trail rides in any condition. - Additional sidewall protection for exceptional durability, plus sidewall stiffness for stability - Folding bead - 2Bliss ready