
PBR Standard Steel Sprocket 4391 - 420 (Manufacturer Ref: 4391 48 F)
Designed based on PBR's racing experience, this rear steel sprocket offers a reliable solution for urban machines. Made from 18NCD5 steel alloy, it combines strength and durability for daily commutes as well as more demanding rides. Its black finish provides a discreet and long-lasting look on the transmission.
Ideal as an original replacement for scooters and small displacement bikes equipped with 420, this sprocket easily fits standard chain kits. It is aimed at riders looking for a durable transmission part that can withstand intensive urban use while maintaining smooth chain performance.
Compatibility (examples):