Abstract: The present invention is an after-market vehicle-lowering steering knuckle (drop spindle) designed for use with a large-bore “live” wheel hub to lower a vehicle chassis. This is accomplished through the inversion and modification of the upper and lower ball joints as compared to a factory steering knuckle, and a modification of the bolt assembly for attaching the wheel hub assembly to the spindle. The present invention allows the factory-supplied upper and lower control arms to be used, providing a considerable cost savings to the end user. The drop spindle design described herein may also be used to lower four-wheel drive trucks.