Vortex 165ZK-37 Black Aluminum Rear Sprocket 37-Tooth

The Vortex 165ZK-37 is a 37-tooth black anodized aluminum rear sprocket engineered for performance motorcycle applications. Built to Vortex Racing's exacting standards, this sprocket delivers a compelling combination of reduced rotational mass and outstanding durability for street and track use.

Key Features:

• 37-Tooth configuration for optimized gear ratio tuning
• Black anodized finish — anodized first, then CNC machined for a bright silver tooth highlight contrast
• Lightweight aluminum construction machined from high-grade aluminum alloy per Vortex specifications
• Patented Vortex tooth profile — unique tooth design engineered to increase sprocket longevity and reduce chain wear
• Precision CNC machined for consistent concentricity and smooth, efficient power transfer
• Designed to work with the corresponding Vortex front sprocket and compatible motorcycle chain

Vortex Racing sprockets are a popular upgrade over OEM gearing, allowing riders to fine-tune acceleration and top-end speed characteristics. The black anodized aluminum construction saves weight compared to steel sprockets while maintaining the strength needed for demanding street and racing use.