FREE WD-40 CHAIN LUBRICANT DID PROFESSIONAL TRANSMISSION KIT CHAIN: DID 525VX (Gold & Black) LENGTH: 116 links with rivet joint (ZJ) DENATURE: EQUAL TO THE ORIGINAL CROWN MATERIAL: STEEL CROWN COLOR: STANDARD PINION MATERIAL: STEEL Free WD-40 spray grease Increasing the rigidity of the chain eliminates bulging and bending, improves the handling of the bike. With DID X-Ring the life of the chain increases by 40% compared to that of a chain with O-Ring. Less Power Loss of 50%: The lower friction of a chain with X-Ring, compared to that of an O-Ring chain, reduces power loss by 50%. Better performance: It improves the performance of the previous VM series, in fact it has the same duration index as the ZVM-X series. Shipments relating to your orders will be made exclusively with GLS EXECUTIV