Vortex 840ZUV4-43 Aluminum Rear Sprocket for BST Wheels Sprockets - 43-Tooth

The Vortex 840ZUV4-43 is a lightweight aluminum rear sprocket engineered for BST (BlackStone Tek) carbon fiber wheels, featuring a 43-tooth count for optimized drive performance. Manufactured 100% in the USA, this sprocket is purpose-built for riders who demand precision, reduced rotating mass, and lasting durability on the street or track.

Key Features:

• 7075 T6 billet aluminum construction — lightweight for reduced rotating mass and improved throttle response
• 100% CNC machined in the USA to exacting tolerances
• Specially formulated alloy per Vortex specifications for maximum strength-to-weight ratio
• Silver anodized finish — electrically coated for corrosion resistance and a bright appearance
• Vortex patented unique tooth design with saber tooth grooves for ideal chain engagement and extended sprocket longevity
• BST wheel compatible — 5-bolt pattern, 100mm Pitch Circle Diameter (PCD), 76mm sprocket ID
• 43-tooth rear sprocket for balanced acceleration and top-speed gearing

Vortex Racing has been producing top-quality motorcycle racing components since 1995, with each part tested on the track alongside professional race teams worldwide. The 840ZUV4-43 delivers the same race-proven performance trusted by champions in Road Racing, Supercross, and Motocross applications.