Vortex 435ZR-43 Red 520 43-Tooth Aluminum Rear Sprocket

The Vortex 435ZR-43 is a lightweight, high-performance 43-tooth rear sprocket engineered for competitive and street riders who demand precision and durability. Manufactured in the USA from a specially formulated CAT5 aluminum alloy developed to Vortex's own specifications, this sprocket delivers an exceptional strength-to-weight ratio over stock iron or steel alternatives.

Designed for the 520 chain pitch, this sprocket is finished in a striking red anodized coating with contrasting silver machine-cut accents, and is available in four colors. Every unit is 100% CNC machined to tight tolerances, ensuring consistent fitment and reliable chain engagement.

Key Features:

• 43 teeth, 520 chain pitch rear sprocket
• Lightweight CAT5 aluminum alloy construction — Vortex proprietary material specification
• 100% CNC manufactured in the USA for precision fitment
• Patented Vortex tooth profile for extended sprocket longevity and reduced chain wear
• Red anodized finish with contrasting silver machine cuts
• Available in 4 colors to match custom builds

Whether used as a direct replacement or as part of a 520 chain conversion, the Vortex 435ZR-43 is a proven upgrade for sport and track riders seeking reduced rotating mass and improved throttle response.