I'm considering a new Ford Fiesta, but I'm concerned that it has a tyre mobility kit in lieu of a spare wheel. How do they work? Are they reliable? Do they damage the tyre? Am I over-reacting?
They fill the tyre with foam that supports it until you can get it replaced or repaired. They are reliable, but the foam can be a pain in the backside for the tyre people who have to clean it out in the case the tyre is repairable, and you are probably over-reacting a little.