Vortex 190ZR-55 530-Pitch 55-Tooth Aluminum Rear Sprocket

The Vortex 190ZR-55 is a high-performance 55-tooth, 530-pitch aluminum rear sprocket designed for sport bikes and stunt riding applications. Engineered for riders who demand aggressive gearing for maximum low-end torque and wheelie-friendly power delivery, this large tooth-count sprocket is one of the most popular choices in the stunt riding community.

Key Features:

• 530 pitch — compatible with all standard 530-pitch drive chains
• 55 teeth — dramatically increases gear ratio for enhanced low-end acceleration and stunt performance
• Manufactured from high-quality 7075 T6 aluminum — lightweight yet durable construction
• 100% CNC machined in the USA to precise tolerances
• Silver anodized finish — note: Vortex sprockets in the 55T and above range are available in silver only
• Vortex patented tooth profile for extended sprocket life and optimized chain engagement
• Specially formulated alloy developed to Vortex's own specifications for maximum strength-to-weight ratio

Running a 55-tooth rear sprocket significantly raises the final drive ratio, delivering more torque and slower top speed — ideal for stunt bikes, track use, and riders looking to maximize acceleration out of corners. As with all large aluminum sprockets, regular chain cleaning every 300–600 miles on street bikes is recommended to maximize drivetrain longevity.