D.I.D 520ERV7 X-Ring Drive Chain 520

D.I.D is a Japanese manufacturer of high-performance transmission parts that is renowned worldwide for the quality of its chains and chain kits. Closely involved in competitive racing, the brand also supplies OEM parts for numerous machines.

The ERV7 chain is an improvement on the ERV3 which was introduces more than a decade now !

• Stronger inner plates, resulting in a 3% higher tensile strength
• Greater chain life, which is increased by 13% due to material upgrades with the patented X-Ring seal
• The ERV7 will be slightly heavier than the ERV3