The DID 420D is a standard non-sealed (non O-ring) roller drive chain for small-displacement bikes originally equipped with a non O-ring chain. It’s a simple, reliable choice with a clip-type master link for quick installation.
The DID 420D Standard Chain is a straightforward, non-sealed roller drive chain designed for dependable everyday use on smaller bikes. If your bike was originally equipped with a non O-ring chain, the 420D is a practical replacement that keeps maintenance simple while delivering consistent power transfer to the rear wheel.
With its clip-type master link, installation and removal are quick and convenient—ideal for regular servicing, track prep, or gearing changes. DID’s Standard Series construction provides a solid balance of durability and value for riders who want a proven, no-nonsense chain setup.
