When tyre companies fit new tyres they check the pressures while the wheels are off the car. When the wheels are fitted to the car do the pressures alter due to the weight of the car ,engine etc?
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Not enough to worry about, the volume of the tyre may reduce slightly as the bottom is squashed by the floor, but this usually bulges back out everywhere else because the tyre is elastic.
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Curious really. After having four new tyres fitted i wondered why the front two were so far out but the rears were good. Had a feeling that the engine weight might make a difference.
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