Vortex 427AZK-51 Rear Sprocket 51 Tooth Aluminum

The Vortex 427AZK-51 is a high-performance rear sprocket featuring 51 teeth and designed for 520 pitch chain applications. This sprocket combines a lightweight aluminum body with a durable steel insert construction, offering an optimal balance of strength and reduced rotational mass for improved acceleration and handling.

Key Features:

• 51-tooth configuration for customized gearing ratios
• Lightweight aluminum construction with hardened steel center insert
• 520 pitch chain compatibility
• CNC-machined for precise fitment and concentricity
• Hard-anodized finish for enhanced wear resistance and corrosion protection
• Self-cleaning mud grooves help prevent debris buildup

Vortex sprockets are engineered to strict tolerances and manufactured using aerospace-grade materials. The hybrid aluminum/steel design provides excellent durability while reducing unsprung weight compared to all-steel sprockets, making this an ideal upgrade for both street and track applications.