Vortex 840ZK-46 CAT5 Aluminum Rear Sprocket 46T 530 Chain for Marchesini BST Marvic Wheels

The Vortex 840ZK-46 is a CAT5 aluminum rear sprocket engineered for high-performance motorcycle racing. Designed specifically for use with Marchesini, BST, Marvic, and Rotobox aftermarket wheels, this 46-tooth sprocket is built to exacting standards for riders who demand the best from their drivetrain.

Key Features:

• 46-tooth, 530 chain pitch rear sprocket
• Manufactured from 7075 T6 aerospace-grade billet aluminum for an exceptional strength-to-weight ratio
• 100% CNC machined in the USA to Vortex's precise tolerances
• Anodized finish with contrast-cut machined accents for corrosion resistance and aggressive styling
• Patented saber tooth groove design for increased sprocket longevity and improved chain engagement
• Lightweight construction reduces rotating mass for improved acceleration and throttle response
• Compatible with 5-bolt aftermarket wheel hubs — 100mm bolt circle (PCD), 76mm hub bore, 10.5mm bolt holes
• Proven in Pro Street Drag Racing and AMA Superbike competition

The Vortex 840ZK sprocket series is the go-to choice for racers running premium carbon fiber and forged wheels. The specially formulated CAT5 alloy, combined with Vortex's patented tooth geometry, delivers the durability and precision required on the track while shedding critical grams compared to OEM steel sprockets.