Vortex 255AZK-50 Black Aluminum 50-Tooth 520-Pitch Rear Sprocket

The Vortex 255AZK-50 is a 50-tooth, 520-pitch aluminum rear sprocket finished in a black anodized coating. Engineered for serious street and track riders, this sprocket is part of Vortex's proven aluminum sprocket lineup — a trusted name in motorcycle drivetrain performance.

Key Features:

• Material: 7075 T6 aerospace-grade aluminum — significantly lighter than OEM steel sprockets
• CNC Machined: 100% CNC manufactured in the USA to tight tolerances for precise fit and consistent power transfer
• Black Anodized Finish: Durable anodized coating provides corrosion resistance and a sharp, aggressive appearance
• 50 Teeth: Increased tooth count for improved low-end torque and acceleration
• 520 Pitch: Compatible with standard 520 chain applications
• Vortex Patented Tooth Design: Unique tooth profile reduces chain wear and maximizes sprocket longevity
• Weight Reduction Cutouts: Strategically placed lightening holes reduce rotating mass for improved throttle response
• Mud-Clearing Grooves: Built-in grooves between teeth help keep the drivetrain clean

The 255AZK-50 is an ideal upgrade for riders looking to fine-tune their gearing ratio for increased acceleration and reduced highway RPM. Switching from a stock steel sprocket to this lightweight aluminum unit lowers unsprung rotating mass, delivering a noticeably more responsive feel under acceleration.