Vortex 120BZK-50 CAT5 Aluminum Rear Sprocket 520 Pitch 50 Tooth Black

The Vortex 120BZK-50 is a 520-pitch, 50-tooth CAT5 aluminum rear sprocket finished in a black anodized coating. Designed for performance street and track riders who demand precision and reduced drivetrain weight, this sprocket is a direct upgrade over heavier OEM steel units.

Key Features:

• CAT5 Aerospace-Grade 7075 T6 Aluminum – Specially formulated alloy per Vortex specifications for maximum strength-to-weight ratio
• 100% CNC Machined in the USA – Manufactured to tight tolerances ensuring concentricity and smooth, consistent power delivery
• Black Anodized Finish – Hard-coat anodizing provides corrosion resistance and long-term durability
• Lightening Holes – Strategically placed cutouts reduce rotating mass for improved throttle response and acceleration
• Unique Vortex Tooth Profile – Patented tooth design minimizes chain wear and increases sprocket longevity
• Mud-Clearing Grooves – Built-in grooves between teeth help keep the drivetrain clean under all conditions
• 520 Chain Pitch – Compatible with standard 520 pitch drive chains
• 50 Teeth – Provides a taller rear gear ratio suited for low-end torque and acceleration tuning

Vortex Racing sprockets are trusted by professional race teams worldwide and are manufactured in the United States to the highest quality standards. The 120BZK-50 is an ideal replacement or performance upgrade for riders looking to fine-tune their gear ratio while reducing unsprung rotational mass.