Vortex 312ZB-55 Black Aluminum Rear Sprocket 415-Pitch 55-Tooth

The Vortex 312ZB-55 is a 55-tooth, 415-pitch aluminum rear sprocket finished in a durable black anodized hard-coat. Engineered for performance riders who demand precision and reduced rotating mass, this sprocket is 100% CNC machined in the USA from a specially formulated aluminum alloy to Vortex's exacting standards.

Key Features:

• 415-Pitch chain compatibility — matches OEM and aftermarket 415 chain setups
• 55-Tooth count for aggressive low-end torque and acceleration-focused gearing
• Black anodized hard-coat finish for enhanced corrosion resistance and durability
• Lightweight 7075-T6 aerospace-grade aluminum construction reduces rotational mass
• 100% CNC machined in the USA to tight tolerances
• Vortex patented unique tooth design increases sprocket longevity and chain engagement
• Specially formulated alloy per Vortex specifications

Choosing a higher tooth count like 55T on the rear increases the final drive ratio, delivering stronger bottom-end power and faster acceleration at the cost of top-end speed — ideal for stunt riding, tight circuits, or maximizing launch performance. Ensure your front sprocket and chain are also 415-pitch when fitting this sprocket.