All the sweet goodness of the PowerBlock S-Spec, but in a steel bead with a thicker, stronger sidewall. The standard PowerBlock strikes the sacred equilibrium between performance and value.

Features
- Centre row - “Power Blocks” are precisely sized to balance traction with low rolling resistance.
- Sidewall texture - Specially designed texture pattern, strategically applied to the sidewall, adds abrasion protection without sacrificing casing suppleness.