Vortex 840CKV4-43 Aluminum Rear Sprocket 43-Tooth 530 Chain Black/Silver for BST Wheels

The Vortex 840CKV4-43 is a 43-tooth aluminum rear sprocket engineered specifically for use with BST (British Superbike Technology) aftermarket wheels and a 530 chain. Designed and manufactured in the USA, this sprocket delivers the precision and durability that Vortex Racing has been known for since 1995.

Key Features:

• 43-tooth, 530 chain pitch — compatible with BST aftermarket wheel fitment
• 100% CNC manufactured in the USA from specially formulated alloy per Vortex specifications
• 7075 T6 billet aluminum construction — lightweight design reduces rotating mass for improved acceleration and throttle response
• Black anodized with machined silver highlights (CKV4 finish) — striking two-tone appearance with corrosion resistance
• Vortex patented unique tooth design — engineered for optimal chain hold and release, increasing sprocket longevity
• Sprocket dimensions: 5-bolt pattern with 10mm holes, 100mm Pitch Circle Diameter (PCD), 76mm sprocket ID
• Gunk-clearing grooves between each tooth help keep harmful contaminants away from the chain interface

The Vortex 840 series is purpose-built for aftermarket wheel applications, offering a direct-fit solution for riders running BST carbon fiber wheels. Lighter rotating mass translates directly to sharper acceleration, quicker deceleration, and more responsive directional changes — making this sprocket a top choice for track day enthusiasts and competitive racers alike.