Vortex 617ZR-55 Aluminum Rear Sprocket 520 Pitch 55-Tooth Red

The Vortex 617ZR-55 is a 55-tooth, 520-pitch aluminum rear sprocket finished in a red CAT5 anodized color. Engineered for performance-oriented riders and stunt applications, this sprocket delivers a significant reduction in rotating mass compared to steel alternatives, helping put more power to the pavement.

Key Features:

• 520 Pitch: Compatible with 520-pitch chain setups, ideal for OEM replacements or suitable 520 conversions
• 55-Tooth Count: Extended tooth count for increased low-end torque and acceleration — a popular choice for stunt riding and aggressive street performance
• 7075 T6 Aluminum Construction: Manufactured from high-grade 7075 T6 aluminum for an optimal strength-to-weight ratio
• CAT5 Anodized Red Finish: Electrically anodized for a vibrant red appearance with corrosion resistance; finish is applied before cutting, producing the iconic two-tone machined look
• 100% CNC Machined: Precision-machined in the USA to exact tolerances for consistent, reliable performance
• Vortex Signature Design: Features Vortex's patent-pending saber tooth groove profile for optimized chain engagement

Note: At 55 teeth and above, Vortex Racing rear sprockets are available in silver only for most applications — verify color availability for your specific fitment. Always replace the front sprocket and chain simultaneously when installing a new rear sprocket to ensure even wear and maximum drivetrain life.