Vortex 317ZKV4-38 V4 Aluminum Rear Sprocket 38T

The Vortex 317ZKV4-38 is a 38-tooth V4 series aluminum rear sprocket, representing Vortex Racing's latest and most advanced sprocket design. Introduced in 2026, the V4 builds on the legacy of Vortex's iconic CAT5 platform with a redesigned pattern that delivers a 10–15% reduction in weight without sacrificing structural integrity, featuring precision-machined faces on both sides for optimal performance.

Key Features:

• V4 Design: Vortex's newest generation sprocket — lighter and more performance-focused than the classic CAT5
• 7075-T6 Billet Aluminum: Aerospace-grade alloy construction reduces rotating mass for improved acceleration and throttle response
• 100% CNC Machined: Manufactured in the USA to the tightest tolerances for precise fitment and consistency
• Saber Tooth Groove Design: Vortex's patent-pending unique tooth profile increases sprocket longevity
• Anodized Finish: Protective anodized coating applied before cutting, producing the iconic two-tone machined appearance
• 38 Teeth (38T): Fitment code 317 — verify chain pitch compatibility before installation

Vortex aluminum sprockets are approximately half the weight of comparable steel sprockets, making this an ideal upgrade for road racing, motocross, flat track, and drag racing applications where weight savings directly translate to performance gains. To maximize service life, chain and sprocket should be cleaned and tension checked every 300–400 miles on street bikes, and after every ride on dirt bikes.

Manufactured by Vortex Racing, a U.S.-based company with over 15 years of experience producing race-proven drivetrain components trusted by professional race teams worldwide.