Are runflat tyres just a ruse to relieve manufacturers of the cost of including a spare?

I'm a bit suspicious of runflat tyres. What are the pros/cons of using them? Is it just a manufacturers' ruse to relieve them of the cost of including a spare?

Asked on 24 August 2018 by Nigel Fortnam

Answered by Honest John
Basically they remain in shape after losing their air, allowing you to continue driving at reduced speed to your destination or a place of safety. BMW puts a limit of 50mph and 50 miles on this, but I know someone who drove back from Spain with a punctured runflat. The huge advantage is not being stuck on a hard shoulder.
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