EK/PBR 420SR 11/50 Chain Kit – Standard Sprocket
Designed for urban use and small displacement bikes, this complete kit combines the EK 420SR non O-ring chain with a PBR front sprocket and a steel rear sprocket. Ideal for those seeking a robust and easy-to-maintain transmission, this package replaces the sprocket, rear sprocket, and chain in a single operation.
Key Features:
- Composition: EK 420SR chain + PBR steel sprocket (11 teeth) + steel rear sprocket (50 teeth)
- Chain Type: 420SR (non O-ring chain, treated with a special coating)
- Materials: high-strength steel for the chain, sprocket, and rear sprocket
- Strength: nominal tensile strength 6,500 N (suitable for up to ~25 HP)
- Dimensions: pitch 420, roller width 6.35 mm, 132 links
- Weight: 0.75 kg for 100 links
- Durability: relative lifespan index 200 (based on 100 links)
This kit emphasizes simplicity and longevity: machined teeth for good engagement, treated steel to resist abrasion, and reliable performance on urban routes or light off-road use. Be sure to check the mounting mark and properly adjust the chain tension during installation to ensure a quiet transmission and controlled wear.
