Vortex 193A-40 520 Aluminum Rear Sprocket Silver 40-Tooth

The Vortex 193A-40 is a 40-tooth, 520-pitch aluminum rear sprocket finished in silver, designed as a lightweight performance upgrade over heavier OEM steel sprockets. 100% CNC-manufactured in the USA from a specially formulated aluminum alloy per Vortex specifications, this sprocket delivers the precision and durability that road racers and performance street riders demand.

Key Features:

• 520 Chain Pitch — compatible with 520-series drive chains
• 40 Teeth — allows fine-tuning of final drive gear ratio for acceleration or top-speed optimization
• Aerospace-Grade Aluminum Construction — significantly lighter than OEM steel, reducing rotating mass for improved throttle response and handling
• Silver Clear-Coat Finish — clear coating applied to help prevent oxidation and maintain the classic machined aluminum appearance
• 100% CNC Machined in the USA — manufactured to tight tolerances for precise chain engagement and long service life
• CAT5 Sprocket Design — Vortex's iconic two-tone machined look with lightening pockets for maximum weight savings

Vortex aluminum sprockets are approximately half the weight of comparable steel sprockets, directly reducing rotating mass for crisper acceleration response. To maximize sprocket life, Vortex recommends cleaning and tensioning the chain every 300–400 miles when running an aluminum sprocket. This sprocket must be paired with a 520-pitch chain and front sprocket for proper drivetrain compatibility.