What is a spindle on a car?

A spindle, also known as a steering knuckle, is a component on a car that connects the suspension and steering system to the wheel. It is typically a forged or cast piece of metal that houses the wheel hub and bearings, allowing for smooth rotation of the wheel. The spindle is attached to the upper and lower control arms of the suspension system and connects to the tie rod end which is connected to the steering system.

The spindle plays a crucial role in maintaining proper alignment of the wheels and supporting the weight of the vehicle. It also allows for smooth steering and handling by allowing the wheels to move freely up and down over bumps and uneven road surfaces.

In the event of a collision or impact, the spindle can become damaged, leading to issues with steering, alignment, and overall driving performance. It is important to regularly inspect and maintain the spindles on a car to ensure safe and efficient operation.