Vortex 203BZK-37 CAT5 Rear Sprocket Black 37-Tooth Aluminum

The Vortex 203BZK-37 is a CAT5 rear aluminum sprocket featuring a 37-tooth count and a striking black anodized finish with machined accent highlights. Engineered for performance-focused riders, this sprocket is 100% CNC machined in the USA from a specially formulated aluminum alloy per Vortex's exacting specifications.

Key Features:

• 37-Tooth rear sprocket for precise final drive gearing
• CAT5 aluminum construction — lightweight design reduces rotating mass for improved throttle response
• Black anodized first, then CNC machined — resulting in a durable finish with silver machined accent highlights
• Vortex patented tooth design for increased sprocket longevity and smoother chain engagement
• Specially formulated alloy per Vortex Racing specifications for optimal strength-to-weight ratio
• 100% CNC manufactured in the U.S.A. to tight tolerances

Vortex Racing is a U.S.-based manufacturer with over 15 years of experience producing top-quality motorcycle racing components validated by professional race teams worldwide. The 203BZK-37 delivers the ideal blend of lightweight performance and durability for street and track applications.