
PBR Standard Steel Sprocket 4412 - 420 (Manufacturer Ref: 4412 52 F): a rear sprocket designed for urban riders seeking durability and longevity. Made from 18NCD5 steel alloy with a black finish, it fits on drivetrains equipped with a 420 pitch chain and offers 52 teeth for a standard gear ratio suitable for 50cc city and lightweight cross bikes.
Drawing from PBR's experience in competition, this sprocket benefits from a strict manufacturing process to minimize wear: corrosion and abrasion resistance, and reduced friction due to the quality of the alloy. It is primarily suitable for the aforementioned small displacement bikes — DERBI SENDA X-TREME 50 SM, GILERA SMT 50 DRIFTING, APRILIA SX 50 FACTORY — and can replace the original part when the pitch and number of teeth match.
To maintain the transmission, check the condition of the chain and the front sprocket before installation and adhere to the manufacturer's torque specifications. This PBR sprocket is a solid choice for keeping a reliable and durable transmission in daily urban use.