Vortex 347ZB-55 Black Aluminum Rear Sprocket 55-Tooth

The Vortex 347ZB-55 is a 55-tooth black anodized aluminum rear sprocket engineered for sportbike performance and stunt riding applications. Precision-machined from high-grade 7075 aircraft-quality aluminum, this sprocket delivers a significant weight reduction over stock steel units, helping reduce rotating mass and improve throttle response.

Vortex's patented tooth profile and CNC manufacturing process ensure tight tolerances and consistent chain engagement, extending the service life of both the sprocket and chain. The durable black anodized finish adds corrosion resistance and a clean, aggressive appearance.

Key Features:

• 55-tooth rear sprocket — ideal for stunt riding, increased low-end torque, and quicker acceleration
• Manufactured from 7075 aircraft-grade aluminum for an optimal strength-to-weight ratio
• 100% CNC machined in the USA to the tightest tolerances
• Black anodized finish for corrosion resistance and lasting appearance
• Vortex patented tooth design for increased sprocket longevity and smooth chain engagement
• Reduces rotating mass compared to OEM steel sprockets, improving overall drivetrain performance

Vortex Racing has been manufacturing championship-proven motorcycle components since 1995, with products tested directly by top professional racers in AMA Superbike, Supercross, and motocross competition. The 347ZB-55 is part of Vortex's extensive rear sprocket lineup, purpose-built for riders who demand race-grade quality on the street or track.