Vortex 775ZK-37 CAT5 Aluminum Rear Sprocket Black 37-Tooth

The Vortex 775ZK-37 is a 37-tooth CAT5 aluminum rear sprocket finished in black anodize, designed as a direct-fit performance upgrade for compatible motorcycles. CNC-machined from high-strength aluminum, this sprocket delivers a significant weight reduction over stock steel units, helping reduce rotating mass for improved throttle response and overall drivetrain efficiency.

Key Features:

• 37-Tooth Rear Sprocket — precise tooth count for stock or custom gearing configurations
• CAT5 Aluminum Construction — CNC-machined from high-strength aluminum alloy for lightweight durability
• Black Anodized Finish — anodized first, then CNC-machined for a distinctive two-tone black and silver appearance
• Lightening Holes — strategically placed to further reduce rotating mass without sacrificing structural integrity
• Precision Manufactured — machined to tight tolerances to ensure concentricity and smooth chain engagement
• 100% CNC Manufactured in the USA — built to Vortex Racing's exacting race-proven standards

The 775ZK-37 is part of Vortex Racing's extensive rear sprocket lineup, offering riders a proven performance upgrade whether for street, track day, or racing use. Vortex sprockets are a popular choice for riders looking to fine-tune their final drive gearing ratio for quicker acceleration or adjusted top-end performance.