Vortex 251AS-43 Steel Rear Sprocket 520 Pitch 43 Tooth Black

The Vortex 251AS-43 is a high-performance steel rear sprocket designed for 520 pitch chain conversions on sport bikes. This 43-tooth sprocket combines race-proven durability with precision engineering for riders seeking reliable performance on the street or track.

Key Features:

• 100% CNC manufactured in the USA for precise tolerances and perfect fitment
• Carbon steel alloy construction per Vortex specifications for maximum strength and wear resistance
• Electro-plated satin black finish prevents corrosion and provides a stealthy appearance
• Patented tooth design increases sprocket longevity and ensures optimal chain hold and release
• 520 pitch conversion design reduces rotating mass for improved acceleration
• 43-tooth configuration for balanced gearing performance

Vortex Racing sprockets are manufactured to the tightest tolerances in the industry and tested by professional race teams worldwide. The unique tooth profile on this steel sprocket delivers extended service life compared to standard designs, while the precision CNC machining ensures perfect chain engagement for smooth power transfer and reduced wear.