Vortex 170ZBV4-51 VTX Aluminum Rear Sprocket 51-Tooth Black Hard-Coat

The Vortex 170ZBV4-51 is a 51-tooth aluminum rear sprocket from Vortex Racing's VTX series, engineered for riders who demand race-proven drivetrain performance on the street or track. Manufactured in the USA, this sprocket delivers a significant weight reduction over stock steel sprockets, helping reduce rotating mass and improve throttle response.

Key Features:

• 7075 T6 billet aluminum construction — aerospace-grade alloy specially formulated to Vortex specifications for maximum strength-to-weight ratio
• Black PTFE hard-coat finish — bonds directly to the aluminum surface for a more durable, low-friction interface compared to standard anodizing
• 100% CNC machined — tight tolerances ensure concentricity and smooth, consistent power delivery
• Patented saber tooth groove design — unique tooth geometry increases sprocket longevity and reduces chain wear
• Lightening holes — strategically placed cutouts reduce rotating mass without sacrificing structural integrity
• 51 teeth — taller rear gearing for applications requiring increased low-end torque and improved acceleration

Vortex Racing has supplied top professional race teams worldwide across Motocross, Supercross, Road Racing, and Flat Track disciplines. Each sprocket is tested on the track with direct feedback from competitive riders, ensuring that the 170ZBV4-51 meets the demands of both weekend warriors and serious competitors alike.