Vortex 526AZB-42 Conversion Aluminum Rear Sprocket Sprockets - 520 CAT5 42-Tooth Blue

The Vortex 526AZB-42 is a 42-tooth, 520-pitch CAT5 aluminum rear sprocket designed for riders seeking a lightweight, high-performance upgrade over standard OEM steel sprockets. Engineered for 520-size OEM replacements or suitable conversions to 520-size chain and sprocket setups, this sprocket delivers a meaningful reduction in rotating mass that translates to improved acceleration and handling.

Key Features:

• Lightweight CAT5 aluminum construction — machined from aerospace-grade aluminum, significantly lighter than OEM steel alternatives
• 100% CNC manufactured in the USA — precision machined to tight tolerances for consistent fit and performance
• Specially formulated alloy — proprietary alloy blend developed to Vortex specifications for optimal strength-to-weight ratio
• Saber tooth grooves — Vortex's patented unique tooth design extends sprocket longevity and reduces wear
• Anodized blue finish with contrasting silver machine cuts — color anodizing applied to the body while sweeps, mud grooves, and teeth retain a bright silver highlight for a distinctive two-tone appearance
• 520 pitch — designed for 520-size chain, ideal for OEM replacements or chain conversion builds

The Vortex CAT5 sprocket line is a popular choice for street and track riders looking to reduce unsprung and rotating weight without sacrificing durability. The patented saber tooth groove design and proprietary alloy formula set these sprockets apart from generic aluminum alternatives.