In one aspect, a vehicle steer axle has a horizontal axle member that has a steering axis male feature integrally formed on an end, wherein a vehicle steering knuckle, which forms a vehicle steering axis female feature, is directly rotatably coupled to the vehicle steer axle. In another aspect, a vehicle steering knuckle has a horizontal steering knuckle member that has a steering axis male feature integrally formed on an end, wherein the vehicle steering knuckle is directly rotatably coupled to a vehicle steer axle, which forms a vehicle steering axis female feature. Neither of these aspects utilize a separable kingpin.