Shinko introduces a tread designed for serious sportbike riding with the new 010 Apex Radial. The 010 Apex radial front is Aramid belted for enhanced high-speed performance. Tread radius designed for enhanced high-speed cornering. Intermediate compound. W-speed rating (168 MPH). DOT approved. Tire Specifications: Load / speed index: 58W. Recommended rim (inches): 3.50. Overall diameter (inches): 23.62. Overall width (inches): 4.80. Maximum load (pounds) / PSI: 520 @ 42 PSI. Construction: Radial.