



The standard 428 steel PBR sprocket is a part designed for riders looking for a simple and reliable solution for transmission. Drawing on PBR's competitive experience, it focuses on high-quality raw materials and a strict manufacturing process to provide consistent tooth engagement and controlled wear on urban motorcycles and roadsters.
Technical specifications:
This 45-tooth sprocket fits chains with a pitch of 428 and serves as a direct replacement for many small displacement motorcycles. Examples of compatible bikes: SHERCO 50 SM-RS (2026), BULTACO LOBITO 50 (2005), HM CRE 50 SIX DERAPAGE (2003). Easy to install, it is aimed at urban riders and roadster owners looking for a robust and understated part.
Manufacturer reference: 4390 45 F