Vortex 838C-66 Aluminum Rear Sprocket 66-Tooth

The Vortex 838C-66 is a 66-tooth aluminum rear sprocket engineered for street stunt riding, track use, and performance applications. Built to Vortex Racing's exacting standards, this sprocket delivers the combination of lightweight construction and durability that Vortex is renowned for in the powersports industry.

Key Features:

• 66-tooth count — provides aggressive gear reduction for maximum low-speed torque and acceleration, ideal for stunt riding and track performance tuning
• Lightweight aluminum construction — CNC-machined from high-strength 7075-T6 aluminum alloy formulated to Vortex specifications for optimal strength-to-weight ratio
• 100% CNC manufactured in the USA — precision machined to the tightest tolerances for reliable fitment and consistent performance
• Silver anodized finish — corrosion-resistant anodizing protects the sprocket and maintains appearance over time
• Vortex patented tooth design — unique tooth profile promotes smooth chain engagement and extends sprocket service life compared to conventional designs
• Reduced rotational mass — aluminum construction lowers unsprung weight for improved handling and throttle response

The 838C-66 is part of Vortex Racing's trusted rear sprocket lineup, designed as a direct bolt-on replacement that delivers measurable performance gains over stock gearing. Whether you're tuning gear ratios for stunt applications or optimizing acceleration on the track, the Vortex 838C-66 is a proven choice backed by decades of racing development.