PBR Steel Standard 521 - 630 Gearbox output pinionRef : PBR01219A / 1077731001

PBR Standard Steel Sprocket 521 - 630 (manufacturer reference: 521 15 18NC) — a sprocket designed for the final drive of demanding riders, suitable for Cross and Roadster practices. With its 15 teeth, it is intended for 630 pitch chains and follows the 521 format for standard installation on compatible setups.

• Material: high-quality steel (18NCD5 alloy)
• Number of teeth: 15
• Type: 521 sprocket, 630 chain pitch
• Version: standard, manufactured to strict specifications
• Finishes and treatments aimed at limiting corrosion and abrasion

Derived from PBR's competition experience, this sprocket benefits from a strict manufacturing process to ensure dimensional consistency and mechanical longevity. Its design in 18NCD5 steel provides good wear resistance and helps reduce friction in the final drive.

Usage tips: check compatibility with your gearbox and sprocket before replacement, inspect chain and sprocket wear simultaneously, and adhere to the manufacturer's torque specifications during installation. Examples of compatible models: BETA RR 350 4T ENDURO RACING (2019), KAWASAKI Z 1000 H (1980), BETA RR 400 4T ENDURO RACING (2009).