Öhlins Cartridge Kit 30mm BMW S1000RR/HP4, fork springs to be ordered separately. The new Road & Track 30mm cartridge kit was developed with the experience from Supersport and Superstock racing. It doesn't matter if you are going for a national title or just enjoy your time on the racetrack this kit will improve the performance, stability and damping characteristics significantly. The compression damping is in the left fork and rebound damping is in the right fork. This allows all the necessary adjustment of the preload setting to be performed on the top of the fork. The 30mm cartridge kit is easy to install, for best setup and to adjust the suspension to the rider's needs the springs have to be ordered separately. Our alpha Racing WSBK Suspension technician in Germany will set your kit to your specific weight with full riding gear. Adjustments for spring preload, rebound and compression damping Large range of spring rates available (08790 series) New internal pistons for more ride compliance and improved stability