







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: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.