For so-called run-flat tyres (meaning tyres that can be driven even at zero air pressure) in Europe and North America huge sales increases are on the horizon. Run-flats will replace conventional tyres now in use. This can happen only step by step because there is a lack of production facilities for a number of years. Another effect: if the new tyres become standard original equipment, the market for tyres will reduce by twenty percent, because a car fitted with run-flat tyres does not need a spare wheel. Is the development of such products an example of the tyre business shooting itself in the foot? Of course not because it is never possible to stop technical developments like these. And it should be noted that run-flat tyres are more sophisticated than conventional tyres, which compensates for the lack of every fifth tyre in oe. Because tyre pressure warning systems will, in the future, become mandatory on new cars, they need suitable tyres. Run-flat tyres without tyre pressure systems are not practical; the driver might not realise that he is driving at zero pressure at high speed. The reverse situation is possible – indeed already a reality in some models – as the car is fitted with a tyre pressure monitoring system but on conventional tyres. Nowadays, run-flat tyres have moved from the arena of the laboratory and testing and are on the way to becoming a growing part of the market. As with other new technologies, if a new standard replaces an old one, the race is on among new systems (for example which tyre pressure monitoring system is the best), materials (for example which reinforcements should be used for the carcasses) and other developments for the transition period (tyre repair sets).