Vortex 251AZR-48 Conversion Aluminum Rear Sprocket Sprockets - 520 CAT5 48-Tooth Red

The Vortex 251AZR-48 is a 520 conversion CAT5 aluminum rear sprocket designed for performance-oriented motorcycle riders seeking a lightweight, race-proven upgrade over heavier OEM steel sprockets. Manufactured entirely in the USA, this sprocket is precision-CNC machined from a specially formulated aluminum alloy developed to Vortex's own exacting specifications.

The CAT5 series is anodized first, then CNC machined — producing a striking colored finish with bright contrasting silver highlights on the sweeps, mud grooves, and teeth. The result is a distinctively aggressive look backed by genuine race-grade performance.

Key Features:

• 520 chain pitch conversion — lighter chain pitch for reduced rotating mass and improved acceleration
• 48-tooth rear sprocket for optimized gear ratio tuning
• Lightweight CAT5 aluminum construction — significantly lighter than OEM steel sprockets
• Specially formulated aluminum alloy per Vortex proprietary specifications
• 100% CNC manufactured in the USA to tight tolerances
• Saber tooth groove design — Vortex patented tooth profile engineered to extend sprocket service life
• Red anodized finish with contrasting silver machine-cut highlights on teeth and grooves
• Available in multiple colors including red, blue, gold, and black (varies by application)

Vortex Racing has been trusted by professional race teams and champions worldwide for over 15 years. Each sprocket is track-tested and built to the highest quality standards in the industry, making the 251AZR-48 an ideal choice for both competitive racing and performance street riding.