Vortex 253AZR-37 CAT5 520 Rear Sprocket 37-Tooth Red Aluminum

The Vortex 253AZR-37 is a 37-tooth CAT5 rear sprocket designed for motorcycles running a 520 chain pitch. Precision CNC-machined in the USA from a specially formulated aluminum alloy developed to Vortex's own specifications, this sprocket delivers an ideal balance of lightweight performance and long-lasting durability for both track and street use.

The striking red anodized finish provides corrosion resistance while adding a high-visibility, race-inspired look to your drivetrain. The CAT5 series is Vortex's benchmark aluminum racing sprocket, trusted by competitors at all levels for its consistent quality and precise tooth geometry.

Key Features:

• 37-Tooth rear sprocket for 520 chain pitch applications
• CAT5 aluminum construction — lightweight with excellent wear resistance
• 100% CNC manufactured in the USA for precise tolerances
• Red anodized finish for corrosion protection and race aesthetics
• Specially formulated alloy engineered to Vortex specifications
• Direct bolt-on replacement compatible with OEM and aftermarket hubs

Whether you're fine-tuning gearing ratios for the track or refreshing a worn drivetrain on the street, the Vortex 253AZR-37 delivers race-proven quality in a lightweight, precision-machined package.