PBR Steel Standard 577 - 428 Gearbox output pinionRef : PBR00960A / 1077761007

The PBR sprocket reference 577 18 18NC is a standard steel sprocket designed for demanding riders, whether on trails or in urban environments. Drawing from PBR's competitive experience, it focuses on the robustness of materials and controlled manufacturing to provide a reliable and durable transmission part.

• Material: 18NCD5 steel alloy
• Number of teeth: 18
• Chain pitch: 428
• Type / version: 577 – Standard
• Treatment and quality control derived from a strict manufacturing process
• Good resistance to corrosion and abrasion for road and off-road use

This sprocket is intended for motocross and roadster motorcycles requiring a 577 sprocket in 428 — a solid option for original replacements or regular maintenance. Its 18NCD5 steel design minimizes premature wear of the teeth and contributes to a quiet and smooth transmission in daily use.

Compatibility examples: YAMAHA YZ 85 LW BIG WHEELS 19/16 (2026), KAWASAKI Z 125 (2024), MZ 125 SM (2008). Check the dimensions and number of teeth before installation to ensure compatibility with your transmission.