Tyres need to get tested on their strength and endurance. But there are more ways to test them. For example rolling them down a ski ramp.
Sounds strange? Yes. But it is exactly what these Japanese researchers did. They started with a small tyre and build it up to bigger sizes. Also an Formula 1 tyre was jumped off the hill.
But the most spectaculair jump was of course the last attempt with the biggest tyre they could find. Enjoy!