Vortex 170ZK-51 VTX Aluminum Rear Sprocket 51T

The Vortex 170ZK-51 is a high-performance 51-tooth aluminum rear sprocket from Vortex Racing's VTX series, engineered for riders who demand precision, durability, and reduced rotating mass. Crafted from lightweight 7075 aluminum alloy, this sprocket delivers the ideal balance of strength and weight savings over a stock steel sprocket.

Key Features:

• 51-Tooth count for optimized acceleration and gear ratio tuning
• Lightweight 7075 aluminum construction reduces unsprung and rotating weight
• Hard anodized finish for corrosion resistance and extended service life
• CNC precision machined for accurate tooth profile and consistent chain engagement
• VTX series design with lightening cuts to minimize mass without sacrificing rigidity
• Direct OEM-style fitment for easy installation

The Vortex VTX aluminum rear sprocket is a popular upgrade for street, track, and sport bike applications. The 170ZK carrier/sprocket combination is designed to work with specific motorcycle bolt patterns — confirm your application before ordering. Vortex sprockets are a trusted choice among racers and enthusiasts for consistent performance and quality American manufacturing.