Vortex 635ZB-38 Steel Rear Sprocket Pitch Sprockets - 630 38-Tooth Black

The Vortex 635ZB-38 is a steel rear sprocket featuring a 630 chain pitch and 38 teeth, finished in a satin black electroplated coating for corrosion resistance. Engineered by Vortex Racing — a U.S.-based manufacturer with a proven track record in road racing, motocross, and supercross — this sprocket is built to exacting tolerances for reliable, long-lasting performance.

Key Features:

• 630 Pitch — designed for use with 630-series motorcycle chains
• 38-Tooth rear sprocket for precise gear ratio tuning
• Carbon steel construction for maximum strength and durability
• Satin black electroplated finish resists corrosion and maintains appearance
• Vortex patented tooth design extends sprocket service life
• Precision manufactured to ensure concentricity and quiet, smooth operation
• Induction-hardened teeth to minimize surface wear under high-load conditions

The 635ZB-38 is a direct-fit steel rear sprocket replacement for applications using the 630 chain standard. The black finish offers a clean, stealthy look while the hardened steel construction delivers the durability demanded by high-performance street and touring motorcycles. Always replace the front sprocket and chain simultaneously for optimal drivetrain performance and longevity.