It demonstrated the technology by driving a Fiat from Dunlop HQ in Scotland to Turin, Italy, on deflated tyres, and it drove a Corvette from coast-to-coast in the US with deflated rear tyres, too. In the 1970s, Dunlop created its Denovo system, which was a self-supporting tyre that could run without air. In the 1950s, US firm Goodyear created a tyre for Chrysler that featured a special internal lining that could take the vehicle's weight, but again it was an expensive option. However, these were expensive, and didn't really take off. The first run-flat tyres were designed by Michelin for military use, and featured a semi-bulletproof internal foam lining that could support the vehicle's weight. While rubber tyres date back to the late 19th Century, the idea of tyres that can still be driven on when there's no air in them only dates back to the 1930s. What is horsepower? History of run-flat tyres.So rather than carry these alternatives, some car makers offer run-flat tyres on their cars as a means of getting you home should you suffer a puncture. However, these aren't much use if you've got anything worse than a nail in the tyre, as the sealant solution is only really designed to fill small holes. Space-saver spare wheels take up less boot space, while many car makers substitute a spare wheel for a puncture repair kit. Spare wheels take up space, and modern car design increasingly likes to use every available millimetre so there isn't always room for one. In some ways, car makers see the spare wheel as a necessary evil, but run-flat tyres are one solution that means a spare wheel doesn't need to be carried.
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