DID Enduro Chain 520ERV7 x 120ZB Race Gold rivet link

DID Enduro Chain - Made in Japan520ERV3 Enduro and Desert Racing Champion =Low Weight, Low Friction X-Ring520VT2Enduro and Trail Riding = Narrow X-Ring Chain520VX2 Enduro and Trail Riding = Great value X-Ring ChainHalf the Power Loss(Compared with Normal O-Ring):D.I.Ds patented X-Ring construction reduces friction by twisting between the side plates instead of being squashed. Normal O-Rings and other makers modified O-Rings have compressed points that increase friction. The twisting action of the X-Ring minimizes power loss. X-Ring is a U.S.A. Registered Trademark of D.I.D; Daido Kogyo Co. Ltd. Japan1.5 to 2 TImes Longer Wear Resistance (Compared with Normal O-Ring):The X-Rings four contact points greatly increase its sealing performance. This keeps the dirt out and the lubrication in much better than any other O-Ring. X-Rings have the greatest wear resistance of any other type of O-Ring or Non-O-Ring chain.Fitments:520ERV3 max displacement 750cc (enduro champion x-ring)520VT2 max displacement 500cc (narrow x-ring)520VX2 max displacement 750cc (great value x-ring)NB: Joining Links NOT interchangeable between upgraded 520VX2 and the former 520VX