WP TRAX Shock Absorbers are the most innovative shock absorberson the market. The TRAX unit is a very compact system in thebottom of the shock, which significantly improves the traction of therear wheel. This system has been successfully implemented by theFactory Racing department and many World Championship titlesprove how effective it is.The TRAX system has been developed in order to reduce the time after a bump where acceleration of the motorcycleis not possible because of the slow rebound of the rear wheel.The TRAX system registers when the rear wheel has no ground contact and immediately opens an oil bypass so thatthe rear wheel can return to the ground faster than is possible with a conventional system, ultimately allowing forimproved traction and acceleration.