Specially designed for mid engine driven e-bikes such as Bosch, Panasonic and AEG, These chains have higher TORSION resistance to cope with ruthless shifting and hi-torque This chain is compatible with 12x Campagnolo, Shimano and Sram MTB. They are not compatible with Sram road groups, this is due to a difference in pin length EcoProTeQ (EPT): Anti-Rust technology, Surpasses 650 hours Salt Spray Test Triple X-durability, unmatched chain life- KMC guaranties your satisfaction Non-Directional Design: assembly of this chain is independent of direction. It allows maximum compatibility, no matter MTB or Race: this chain fits all