Spindle

The suspension component on which the hubs, wheels and tires mount and rotate. Spindles on the front suspension are turned side to side to steer the vehicle.

On older rear wheel drive cars, the wheel bearing inside the brake rotor ride n the spindle. The rotors and bearings are held on with a large nut followed by a dust cover. There are no spindles on the rear of cars or trucks.

Newer vehicles do not use a spindle. The sealed front wheel bearings mount directly to the front knuckle assembly and the axle shaft.