Vortex 190ZR-57 Aluminum Rear Sprocket 520 Pitch 57 Tooth

The Vortex 190ZR-57 is a 57-tooth, 520-pitch aluminum rear sprocket engineered for performance motorcycle applications. CNC-machined from premium 7075 T6 aluminum, this sprocket delivers an exceptional strength-to-weight ratio, reducing rotational mass for improved throttle response and acceleration compared to a stock steel sprocket.

Vortex's proprietary tooth geometry is designed for smooth, precise chain engagement and release, extending both sprocket and chain life. The high tooth count makes this sprocket an ideal choice for riders seeking aggressive low-end torque, increased acceleration, and stunt or street performance riding.

Key Features:

• 520 Pitch — compatible with 520-pitch chains; must be paired with a matching 520-pitch front sprocket and chain
• 57-Tooth count — high tooth count tuned for maximum low-end torque and acceleration
• 7075 T6 Aluminum construction — aerospace-grade alloy for superior strength and reduced weight
• CNC-machined to precise tolerances — ensures concentricity for smooth, vibration-free operation
• Vortex unique tooth design — optimized profile for ideal chain hold and release, maximizing wear life
• Lightweight design — reduces rotating mass for improved throttle response and handling
• Sold as a single rear sprocket (hardware not included)

Vortex Racing is a U.S.-based manufacturer trusted by professional race teams worldwide across Motocross, Supercross, Road Racing, Flat Track, and street performance disciplines. The 190ZR-57 is a direct upgrade for riders looking to retune their gear ratio for more aggressive performance.