The Bontrager R2 Hard Case Lite Tyre boasts an advanced tread that gives super-low rolling resistance and excellent cornering grip.    A unique Aero Wing bead eliminates the gap between rim and tyre for aero advantage. Hard-Case Lite protects against punctures with superior, lightweight, sub-tread material.   Bontrager R2 Hard Case Lite Tyre Features Diameter: 700C TPI: 60 TPI Durometer: 60a Type: Clincher Puncture Protection: Hard-Case Lite Colour: Black/Grey Weight: 275g