EK CHAIN 420SRO O-Ring 420 Universal ChainRef : EKC00465A / 1129887025

Manufacturer's ref: 420SRO-STL 132 SKJ — EK 420SRO O‑Ring transmission chain, designed for those seeking a reliable transmission without breaking the bank. The SRO series from EK combines O‑Ring seals, lightweight perforations, and heat-treated steel alloys to provide a robust and precise drive system. Ideal for urban use, lightweight roadsters, and small dirt bikes.

• Type: O‑Ring chain
• Pitch: 420
• Number of links: 132
• Color: Steel / Steel
• Weight: 0.78 kg / 100 links
• Relative lifespan: Index 1000 (for 100 links)

The O‑Ring seals limit lubricant loss between the pins and bushings, while the perforation of the links reduces mass without sacrificing assembly strength. The heat treatments applied to the steel alloys provide the necessary rigidity to transmit the torque from the sprocket to the crown accurately, while maintaining EK's characteristic manufacturing quality.

Commonly mounted on small displacement and lightweight off-road models — examples include applications like the HONDA CRF 110 F, YAMAHA YZ 85 LW Big Wheels, or GAS GAS MC 65 — check the 420 pitch and the number of links for a perfect fit to your sprocket/crown.