When off-roading ... under pressure, but remaining solid. A bend in your steel rim can actually be hammered out right on the ...

Driving with too low pressure (as when the tyre is flat) means the tyre could roll off the wheel, and will have dangerously ... As you drive down the road the air inside a tyre builds up, changing the ...

A Spanish company has designed a speed bump that won't hinder slow drivers but will still stop motorists driving too fast ... which changes viscosity when pressure is applied at high velocity.