Vortex 920AZB-40 VTX Aluminum Rear Sprocket Pitch Sprockets - 40T 520

The Vortex 920AZB-40 is a high-performance 40-tooth aluminum rear sprocket engineered for riders who demand precision, durability, and lightweight performance. Part of the Vortex VTX AZB series, this sprocket is CNC-machined from high-grade 6061-T6 aluminum for an exceptional strength-to-weight ratio over stock steel sprockets.

Key Features:

• 40 Teeth — direct replacement or gearing upgrade/downgrade option
• 520 Chain Pitch — compatible with standard 520-series drive chains
• CNC-Machined 6061-T6 Aluminum construction for reduced unsprung weight
• Hard anodized finish in black (AZB) for corrosion resistance and long-lasting appearance
• Precision-cut tooth profile for smooth chain engagement and reduced wear
• Significant weight savings compared to OEM steel sprockets
• Direct bolt-on fitment for compatible motorcycle applications

The Vortex AZB series rear sprocket is a popular choice for street and track riders looking to fine-tune their motorcycle's acceleration and throttle response. The hard-anodized black finish provides both aesthetic appeal and added surface protection. Always pair with a quality 520-pitch drive chain for optimal performance and longevity.