520ERV7 Racing Necklace Gold 120 links

DID is a Japanese manufacturer of high-quality transmission parts known worldwide for the quality of its chains and chain sets. The brand is closely involved in racing and also supplies OEM parts for various brands.

The ERV7 chain is an improvement over ERV3. Stronger inner plates result in a 3% higher tensile strength. Longer chain life, which is increased by 13% through material upgrades with the patented X-ring seal.