VX30. Mr. Do-It-All Off-Road tire from IRC Tire. Developed with the help of top Sprint Enduro / Cross Country pro, the VX30 is the new IRC standard for soft-intermediate terrain replacing IX-07S and IX-09W. This tire offers superior grip, bump absorption and enhanced durability. Size is available in big bike sizes only. Block Pattern: Optimized taper angle of the knob offers increased contact patch of the tire for better handling and grip. New Compound: The VX30 comes with all new rubber compound to increase acceleration and breaking traction, with durability and longevity. Carcass Structure: 2ply+Breaker ply provides excellent stability and bump absorption performance. Tire Specifications: Type: TT. L.I.: 54M. Overall diameter (mm): 711. Overall width (mm): 104. Standard rim (inches): N/A.