Vortex 527ZR-37 CAT5 530 Rear Sprocket Red 37-Tooth Aluminum

The Vortex 527ZR-37 is a 37-tooth, 530-pitch CAT5 aluminum rear sprocket finished in a bold red anodized color with contrasting silver machine cuts. Designed as a high-performance upgrade over heavy OEM steel sprockets, this sprocket is engineered for road riders and racers seeking improved drivetrain performance and reduced rotational mass.

Key Features:

• Lightweight CAT5 aluminum construction — significantly lighter than OEM steel sprockets for improved throttle response and acceleration
• 100% CNC manufactured in the U.S.A. to the tightest tolerances
• Specially formulated alloy developed per Vortex's proprietary specifications
• Saber tooth groove design — Vortex's patented unique tooth profile increases sprocket longevity and reduces chain wear
• Color anodizing applied to the body while excluding the sweeps, mud grooves, and teeth — delivering a vivid red flash with bright silver highlights
• 530 chain pitch compatible
• 37 teeth — suitable for stock gearing replacement or mild gearing adjustments

The Vortex CAT5 rear sprocket is a direct upgrade that reduces unsprung and rotating weight, contributing to crisper acceleration and improved overall drivetrain efficiency. The patented tooth geometry is engineered to maximize chain engagement and extend service life compared to conventional sprocket designs.