KMC - e9 - E-BIKE 9 SPD CHAIN The majority of increasingly popular "speed" pedelecs are equipped with mid -drive motors which transfer immense torque through the chain when shifting. In response, KMC has developed e-bike specific, torsion resistant chains to managing these extreme drivetrain conditions – the eBike Series. The direct force from the mid-motor to the cassette causes an enormous strain load on the chain which means a stronger and more durable chain is crucial. KMC has contended with this by combining 20% upgraded durability with the highest Pin Power on the market to ensure longer chain life and higher torsion and stress resistance for the KMC eBike Series Chains. Highest Pin Power Highest Torsion Resistance High Tensile Strength Double X Bridge Shape Triple X Durability Compatibility: BOSCH e-Bike system and other 9 speed e-Bike systems Front single chainring only Size: 1/2" x 11/128" Speed of Sprocket: 9 Compatible Bikes: E-Bike, Derailleur Chain Connecting Link: CL566E (Non-reusable)