Vortex 505ZB-57 Rear Sprocket 57-Tooth 520 Pitch Black Anodized Aluminum

The Vortex 505ZB-57 is a 57-tooth rear sprocket designed for high-performance motorcycle applications. Machined from lightweight 7075-T6 aluminum and finished with a durable black anodized coating, this sprocket delivers an excellent balance of reduced unsprung weight and long-lasting wear resistance compared to stock steel sprockets.

The 520 chain pitch compatibility makes this sprocket a popular choice for riders who have performed a 520 chain conversion, a common upgrade that reduces drivetrain weight and rotational mass for improved throttle response and acceleration. The 57-tooth count provides increased rear wheel torque, making it ideal for tight, technical riding or applications where low-end and mid-range pull is prioritized over top-speed.

Key Features:

• 57-Tooth Count – Increases rear drive ratio for stronger low-to-mid range acceleration
• 520 Chain Pitch – Compatible with standard and converted 520 drivetrain setups
• 7075-T6 Aluminum Construction – Lightweight yet strong material used in aerospace and racing applications
• Black Anodized Finish – Corrosion-resistant hard coating for long service life and clean aesthetics
• CNC Machined – Precise tooth geometry for smooth chain engagement and reduced wear
• Vortex Racing Heritage – Engineered to meet the demands of track and street performance riders

Vortex sprockets are a trusted upgrade for sport bike and racing enthusiasts seeking drivetrain performance gains without compromising reliability. Always replace the chain and front sprocket together when installing a new rear sprocket for optimal performance and longevity.