Vortex 251A-43 Silver 43-Tooth 520-Pitch Aluminum Rear Sprocket

The Vortex 251A-43 is a 43-tooth, 520-pitch rear sprocket machined from a specially formulated aluminum alloy to Vortex's exact specifications. Designed for competitive riders who demand precision and durability, this sprocket delivers a lightweight performance advantage over heavier steel alternatives without sacrificing longevity.

Key Features:

• 43 Teeth — 520-pitch rear sprocket for optimized chain drive performance
• Lightweight Aluminum Construction — Specially formulated alloy per Vortex specifications reduces unsprung weight
• 100% CNC Manufactured in the USA — Precision machining ensures consistent fit and finish
• Silver Anodized Finish — Corrosion-resistant anodizing protects the aluminum surface and adds a clean, polished look
• Patented Vortex Tooth Design — Unique tooth geometry extends sprocket life and promotes smooth chain engagement
• 520-Pitch Sizing — Compatible with 520 conversion setups, offering a weight savings upgrade from larger stock chain pitches

The Vortex 251A-43 rear sprocket is built for riders converting to a lighter 520 chain and pitch setup. Vortex's patented sprocket profile is engineered to reduce wear on both the sprocket and chain, making it a popular choice for track day enthusiasts and road racers alike.