Vortex 251AZRV4-48 CAT5 Aluminum Rear Sprocket 520 Pitch 48-Tooth

The Vortex 251AZRV4-48 is a CAT5 aluminum rear sprocket featuring a 520 chain pitch and 48-tooth count. Engineered for performance-minded riders, this sprocket is machined from a specially formulated aerospace-grade aluminum alloy to deliver an exceptional strength-to-weight ratio over OEM steel sprockets.

Reducing rotating mass through lightweight aluminum construction directly improves throttle response and acceleration. The sprocket is finished with a vibrant anodized coating that not only provides corrosion resistance but also gives the drivetrain a distinctive, race-ready appearance.

Key Features:

• CAT5 design — Vortex patented sprocket geometry unlike any standard sprocket
• 520 chain pitch — compatible with 520 OEM and 520 conversion setups
• 48 teeth — for tuned gearing acceleration and torque delivery
• 100% CNC machined in the USA — manufactured to the tightest tolerances for perfect concentricity
• Specially formulated aluminum alloy per Vortex specifications for maximum lightness and strength
• Anodized finish — corrosion-resistant coating with a distinctive colored appearance
• Unique tooth design — increases sprocket longevity and reduces chain wear
• Saber tooth grooves — reduce friction and drag for better acceleration and deceleration

The Vortex 251AZRV4-48 is a direct bolt-on upgrade over heavy stock sprockets, ideal for street performance and track use where reduced drivetrain weight translates to measurable gains.