Bridgestone Battlecross X20 Rear Tire - 110/90-19 004596Developed on the race track with professional riders in top motocross competitions, the X20 features new Castle Block technology and a pattern layout proven to dramatically increase traction, cornering grip and the tires working range Builds on the strong reputation created by X30 for medium terrain and X40 for hard terrain, the X20 brings all types of motocross riders, from championship competitors to young beginners, a new level of performance in