The main components connecting the wheels of a car chassis are the wheel hub, tires, suspension system, braking system, steering system, etc. Here is a detailed introduction:

Car wheel hub. Responsible for connecting the wheels and axles, transmitting power.

Tires. Directly in contact with the road surface, supporting the weight of the car and providing traction.

Suspension system. Connect the wheels to the vehicle body, absorb road bumps, ensure that the wheels always stay in contact with the ground, and provide stable driving performance.

Braking system. Ensure car safety by converting the vehicle's kinetic energy into thermal energy through components such as brake drums or discs, brake pads, and brake fluid, to slow down or stop the car.

Steering system. Enable the driver to control the direction of the car, including components such as steering wheels, steering racks, steering knuckles, and power steering pumps.

These components work together to ensure that the car can travel safely and smoothly on the road.