Goodyear develops self-inflating wheels that constantly maintain the perfect air pressure

Inflating your tyres too much can cause them to tear, while not having enough pressure can lead to punctures and damage to the suspension.

With this in mind, Goodyear has created tyres that monitor pressure, and automatically inflate using just a regulator and a tube.

If the regulator senses the pressure dropping it opens a valve to let air in, and this pumps up the tyre to the correct pounds per square inch (PSI) .... http://www.dailymail.co.uk