This 27.5 x 2.25 tyre from CST, appropraitely name the "Gripper", is a well rounded, versatile MTB tyre suitable for use in a variety of conditions. The center tread features 5mm ramped knobs that flow throughout the tyre to help shed mud while decreasing rolling resistance for a smooth comfortable ride. The center tread is perfectly paired with 8mm staggered shoulder knobs for exceptional turning capabilities.