D.I.D's High Performance X-Ring® for Road Racing
D.I.D X-RING® IS SUPERIOR TO OTHER TYPES OF O-RING DESIGNS
Half the Power Loss
(Compared with Normal O-Ring)
D.I.D’s 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 squashed points that increase friction. The twisting action of the X-Ring disperses the pressure and minimizes power loss.
X-Ring is a U.S.A. Registered Trademark of D.I.D; Daido Kogyo Co. Ltd. Japan
1.5 to 2 TImes Longer Wear Resistance
(Compared with Normal O-Ring)
The X-Ring’s 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.
D.I.D's High Performance ER Road Racing Chain
D.I.D X-RING® IS THE WORLD’S LOWEST FRICTION CHAIN


520ERV3 GOLD

The Light Weight Road Racing Champion

EXCLUSIVE RACING X-RING®

CHAIN
DISP. C.C.
MAIN FEATURE
415ERZ MAX. 125 C.C. Non-O-Ring
520ERS2 MAX. 250 C.C. Non-O-Ring
520ERV3 MAX. 750 C.C. X-Ring®


* The maximum c.c. displacement is based on original manufacturers recommended chain size.