Transmission chain DID 520 ERV7 Gold/Gold 122 Links

D.I.D is a Japanese manufacturer of high-performance drive components, renowned worldwide for the quality of its chains and chain kits. ERV chains are made of X-Ring links and are directly derived from racing chains.


- The ERV7 chain is an improvement on the ERV3.
- 3% higher tensile strength
- 13% longer chain life
- Patented X-Ring joint
- Slightly heavier than ERV3
- DID chain type: ERV7
- Drive chain pitch: 520
- Number of links: 122
- Drive chain color: Gold/Or
- Drive chain attachment type: Rivet
- Drive chain quality: Racing