There is nothing wrong with runflat tyres. The problem comes when the car is fitted with excessively big diameter wheels and excessively low profile runflat tyres. These care completely useless. They rob the driver of steering feel, they aquaplane in the wet, they are hopeless on snow, they are vulnerable to pothole and speed cushion damage, they make the rims vulnerable to pothole and speed cushion damage, the tyres wear out much faster, and the tyres are much more expensive to replace. The only upside is that if you are a rapper or a Premier League footballer you might think they "look good". Winter compound tyres are a comparatively new innovation because wide, low profile summer tyres are useless in snow. They are compulsory in Austria from November to March and compulsory in Germany whenever there is snow on the ground. They work brilliantly well.

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