VX40. Intermediate - Hard Terrain. Optimized for shredding through hard-packed trails or race tracks, the IRC Tire VX40 off-road tire will be excellent choice for riders in intermediate to hard terrains. Block Pattern: An optimized knob spacing offers an increased contact patch with the ground. More knobs equals more contact where you need it! Offering better grip and handling in Intermediate to hard pack terrain. Compound: The Front and Rear VX40 comes quipped with an all new rubber compound from IRC. Balancing both performance as well as durability. Carcass Structure: Constructed with a lightweight 2ply+Breaker ply casing providing both high stability and flexibility. Tire Specifications: Type: TT. L.I.: 62M. Overall diameter (mm): 692. Overall width (mm): 135.