Hub Assembly Inboard Sprint Dynamic

The Hub Assembly Inboard Sprint Dynamic from Wilwood is a precision rear wheel hub engineered for high-performance applications where extreme braking power and reliability are non-negotiable. Built for dedicated track machines, autocross competitors, and serious drag racing platforms, this inboard hub assembly serves as the critical foundation for lightweight, responsive brake systems that demand maximum stopping force under sustained heat and load cycling. Whether you're upgrading a vintage sprint car or building a modern competition vehicle, this hub integrates seamlessly into Wilwood's modular brake ecosystem.

Machined from aluminum and finished in gray anodized coating, the Hub Assembly Inboard Sprint Dynamic features a 46-spline drive flange interface that locks to matching Wilwood components with zero play and maximum torque transmission. The inboard design eliminates unsprung weight typically carried by outboard assemblies, lowering your vehicle's rotational inertia and improving suspension response during hard cornering. At just 0.63 lbs, this hub weighs significantly less than cast-iron alternatives, contributing directly to improved acceleration and reduced brake fade during extended competition. The anodized aluminum construction resists corrosion while maintaining thermal conductivity critical for heat dissipation in closed-wheel racing environments.

Competition mechanics and weekend racers benefit most from this hub when building a complete Wilwood inboard brake system—particularly for rear-wheel-drive platforms where weight centralization and unsprung mass reduction are primary tuning variables. Installation requires proper alignment with your existing axle shaft and drive flange; verify your vehicle's spline count and inboard brake kit specifications before ordering. The 46-spline interface ensures compatibility with Wilwood's complete line of performance rotors, calipers, and master cylinders designed for sprint, road course, and drag racing applications. Compact dimensions (5.5 x 1 x 5.5 inches) confirm fit within tight chassis constraints typical of purpose-built race vehicles.