Ducati 1098S 1198S 1198SP Ohlins Forks Mupo Fork Cartridge Kit K911 Ø25mm NewREF#C05DUC031 *Fits only 1098S 1198S SP with Ohlins forks* This new cartridge has been developed thanks to the experience acquired during the races supported by us. This cartridge has a K911 system. it' s a new mechanic system that allows varying the spring elastic constant in the fork without physical replacement of the spring. The difference between the other similar cartridge (C06) is the pistons diameters 25 mm instead 30 mm. Thi kind of cartridge