The Bridgestone X30 is Bridgestones mid terrain MX tyre. The front has a asymmetric block pattern that achieves optimumbraking control and steering. The rear tread has Bridgestones castle block tread pattern were a inner softer rubber block is surrounded by a firmer compound rubber block. This Helps improve grip and traction during accelerating and span>braking while still maintaining tyre life. These are one of our biggest selling tyres because of the durability and all round grip.