Ford Focus hub screws can be removed with special tools. Hub is the part where the axle is installed in the center of the wheel, which is also commonly known as "rim" or "steel ring". The hub is easily polluted by dust. If it is not cleaned for a long time, it may corrode and deform, causing potential safety hazards. The differences between steel wheels and alloy wheels are as follows:

1. The main advantages of steel wheel hub are simple manufacturing process (generally using casting process, such as aluminum alloy wheel hub generally using low-pressure casting process), relatively low cost and strong fatigue resistance of metal;

2. The steel hub is heavy (the steel of the same hub is much heavier than the aluminum alloy material), with large inertia resistance, poor heat dissipation and easy to rust;

3. The alloy wheel hub is light in weight, low in inertia resistance, high in manufacturing accuracy, small in deformation and inertia resistance during high-speed rotation, which is beneficial to improving the straight-line driving performance of the automobile and reducing the rolling resistance of the tire, thereby reducing fuel consumption;

4. The thermal conductivity of alloy material is about 3 times that of steel, and it has good heat dissipation, which can play a certain role in the thermal attenuation of vehicle braking system, tire and braking system.

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