Vortex 610BZR-39 Aluminum Rear Sprocket 520 Pitch 39-Tooth Black with Red Accents

The Vortex 610BZR-39 is a lightweight aluminum rear sprocket featuring a 39-tooth count, 520 chain pitch, and a striking black anodized finish with contrasting red machined accents. Designed for serious street and track riders, this sprocket is 100% CNC manufactured in the USA to precise tolerances, ensuring a concentric, properly balanced fit every time.

Key Features:

• Material: Specially formulated aerospace-grade aluminum alloy per Vortex specifications
• Finish: Black anodized with red machined accent highlights
• Teeth: 39T
• Chain Pitch: 520
• Unique tooth profile engineered to extend sprocket longevity and reduce chain wear
• 100% CNC manufactured in the USA for precise concentricity
• Lightening holes reduce rotating mass for improved throttle response and acceleration
• Anodized finish resists corrosion and maintains appearance under hard use

Vortex rear sprockets are a popular upgrade for riders looking to fine-tune their gear ratios for improved acceleration or top-end performance. The reduced rotating mass compared to steel sprockets contributes to sharper throttle response and a more connected feel on both the street and track.