Vortex 312ZK-48 CAT5 Black Aluminum Rear Sprocket 520 Pitch 48-Tooth

The Vortex 312ZK-48 is a CAT5 series black anodized aluminum rear sprocket featuring a 520 pitch chain interface and 48 teeth. Engineered to Vortex's exacting standards, this sprocket delivers a precision-fit replacement or performance upgrade for riders seeking reduced rotating mass and improved drivetrain efficiency.

Key Features:

• 520 Pitch – Compatible with 520-series drive chains
• 48-Tooth count for tunable gear ratio options
• CAT5 Aluminum Construction – CNC-machined from specially formulated alloy per Vortex specifications for strength and lightweight performance
• Black Anodized Finish – Hard-coat anodizing on the body (excluding tooth sweeps and mud grooves) for durability and corrosion resistance
• Patented Tooth Design – Vortex's unique tooth profile increases sprocket longevity and promotes smooth chain engagement
• Lightening Holes – Strategically placed cutouts reduce overall rotating mass for improved throttle response
• Manufactured to tight CNC tolerances ensuring concentricity and long service life

The Vortex 312ZK-48 rear sprocket is an excellent choice for riders looking to fine-tune gear ratios, reduce unsprung weight, or replace a worn OEM or aftermarket sprocket with a high-quality, race-proven component.