Abstract: A symmetrical tie rod arm is disclosed that can be used on either side of a vehicle to eliminate the need for two separate tie rod arms.

Abstract: A heavy duty steer axle assembly with a live spindle is provided. The assembly includes an axle beam extending transversely across the vehicle, a kingpin disposed within a kingpin bore in the axle beam, a knuckle mounted on the kingpin and rotatable relative to the axle beam, and a spindle hub configured to mount a wheel of the vehicle. A bearing assembly is disposed between the knuckle and spindle hub to allow rotation of the spindle hub. The assembly enables use of a cast, rather than forged, knuckle, allows for removal and service of the vehicle's brake rotor without removal or readjustment of the vehicle's wheel bearings, and allows for an external wheel flange that can be easily replaced with flanges of varying offset, without requiring a new wheel hub assembly.