Vortex 817ZR-39 Steel Rear Sprocket 39-Tooth

The Vortex 817ZR-39 is a 39-tooth steel rear sprocket engineered for motorcycle road racing, street, and track applications. Built to Vortex's exacting standards, this sprocket is manufactured from a carbon steel alloy formulated specifically to Vortex specifications, delivering exceptional strength, durability, and long service life.

Key Features:

• 39-Tooth steel construction — carbon steel alloy per Vortex specifications for superior strength and wear resistance
• Corrosion protection — silver anodized or electro-plated satin black finish to resist rust and corrosion
• Unique tooth profile — Vortex patented tooth design engineered to maximize sprocket longevity and smooth chain engagement
• 100% CNC manufactured in the USA — machined to tight tolerances for precise fitment and optimal power transfer
• Reduced rotating mass — designed to minimize rotational weight for improved throttle response and acceleration

Vortex Racing has been producing top-quality motorcycle racing components for motocross, supercross, road racing, and flat track racing, with their parts tested and validated by professional race teams worldwide. The 817ZR-39 steel rear sprocket is an ideal replacement for OEM sprockets or a performance upgrade for riders seeking improved durability on the street or track.