Vortex 635ZR-52 520-Pitch 52-Tooth Red Aluminum Rear Sprocket

The Vortex 635ZR-52 is a 52-tooth, 520-pitch red anodized aluminum rear sprocket designed for high-performance street and track use. Precision CNC-machined from aerospace-grade 7075-T6 aluminum, this sprocket delivers a significant reduction in rotating mass compared to stock steel sprockets, helping to improve throttle response and acceleration.

Key Features:

• 52 Teeth – Increased tooth count for enhanced low-end torque and quicker acceleration
• 520 Pitch – Compatible with 520-pitch chains, including OEM and aftermarket 520 X-ring and O-ring chains
• Red Anodized Finish – Hard anodized for corrosion resistance and a striking appearance
• 7075-T6 Aluminum Construction – Lightweight aerospace-grade alloy reduces unsprung and rotating weight
• CNC Machined in the USA – Manufactured to precise tolerances for true concentricity and quiet, smooth operation
• Vortex Patented Tooth Profile – Unique tooth geometry engineered to maximize sprocket longevity and chain engagement

The 635ZR series is a popular choice for riders looking to tune their gearing for more aggressive acceleration. Moving to a 52-tooth rear sprocket increases the final drive ratio, delivering stronger pull out of corners and off the line — ideal for track days, canyon carving, or urban riding. Always replace the chain and both sprockets together for optimal wear and performance.