DID 520 ERV3 X-Ring Chain

D.I.D is the number one motorcycle chain in the world. D.I.D chains are used by factory races teams from all manufacturers in race series everywhere.

The D.I.D ERV3 X-ring chain is the ultimate high-performance, lightweight, low-friction race chain available and is used extensively by many off-road race teams. The ERV3 X-ring chain utilizes D.I.D's patented X-ring technology which reduces friction by 50% over standard O-ring chains for minimized power loss. The pins on the ERV3 X-ring chain have been put through a patented heat-treatment process to produce a pin that is 1.5 times harder than conventional pins. The result is a chain that is significantly stronger and offers better wear resistance than many other chains on the market. D.I.D ERV3 X-ring chains feature a gold-plated finish that resists rust and adds a little style to your motorcycle or ATV.

• Exclusively designed for motorcycle racing.
• High performance, lightweight and low friction chain provides the winning edge in World Class competition.
• Features gold color plates.
• Average tensile strength of 8,650 pounds.
• Wear life index: 3100.
• For 250 - 750cc Rally, 750cc Superbike and 250 - 750cc Endurance applications.
• Weight (per 100 links): 3.30 pounds.
• Includes a rivet-style master link.

Half the Power Loss - Compared with Normal O-ring chains, 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.

1.5 to 2 Times Longer Wear Resistance - Compared with Normal O-ring chains, 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.