Vortex 840-57 Rear Sprocket 57-Tooth Silver for BST Wheels 530 Chain

The Vortex 840-57 is a lightweight aluminum racing rear sprocket designed specifically for aftermarket wheels including BST, Marchesini, OZ-Racing, and Rotobox. This 57-tooth sprocket is engineered for 530 chain applications and features silver anodized finish for corrosion resistance and exceptional durability.

Key Features:

• 100% CNC manufactured in the USA from specially formulated 7075-T6 aluminum alloy
• Patented tooth design with saber tooth grooves for improved chain hold and release
• Silver anodized finish prevents corrosion and provides lasting protection
• Lightweight construction reduces rotating mass for improved performance
• Manufactured to the tightest tolerances with race-proven quality
• Sprocket dimensions: 5 mounting holes (10mm) with 100mm PCD and 76mm ID

Vortex Racing has been manufacturing premium motorcycle racing components since 1995, with each product tested on the track by professional race teams worldwide. The 840 series sprockets deliver the durability and precision performance demanded by serious riders and racers.