DID’s 520 ERT3 is a high-performance, lightweight motocross race chain designed for maximum efficiency and low friction. A proven factory-team choice, it delivers an excellent strength-to-weight ratio for competitive riding.
The DID 520 ERT3 is a purpose-built motocross drive chain created for riders who demand maximum performance on the track. Its lightweight, low-friction, non-sealed construction helps improve power transfer and throttle response, making it a go-to choice across racing disciplines—especially popular in the 250 class and widely used by factory race teams.
If you’re looking for a chain that balances durability with minimal rotating mass, the ERT3 is designed to deliver a strong strength-to-weight ratio for hard starts, aggressive corner exits and race-day reliability.
