Vortex 170ZKV4-39 VTX Aluminum Rear Sprocket 39T

The Vortex 170ZKV4-39 is a high-performance VTX Series aluminum rear sprocket designed for riders seeking a lightweight, precision-engineered alternative to stock steel sprockets. Manufactured by Vortex Racing, a trusted name in competitive and street motorcycle components, this sprocket delivers the durability and accuracy demanded by both track and street applications.

Key Features:

• 39-Tooth configuration for optimized final drive gearing
• Precision-machined from high-strength 7075 aluminum alloy for exceptional strength-to-weight ratio
• Hard anodized finish for increased surface hardness and corrosion resistance
• CNC-machined to tight tolerances for smooth, quiet chain engagement
• Lightening cuts reduce unsprung and rotating mass for improved throttle response
• Compatible with 520 chain pitch (verify fitment for your specific application)
• Direct OEM-style bolt pattern for straightforward installation

Vortex VTX sprockets are a popular upgrade for riders looking to fine-tune their gearing ratio without the weight penalty of a stock steel sprocket. Whether used for acceleration-focused street riding or competitive track days, the 170ZKV4-39 provides reliable performance and a proven service life when properly maintained with a quality chain and sprocket kit.