Originally Posted by scotta2
I dont understand, why would you require a spare tyre when you have a run flat? ....
Voerman and mspringer gave great answers to this. RFTs don't roll forever. The issue is not changing a flat by the road or not. The issue is what happens after you drive to a tire shop and because RFTs are expensive and not readily in-stock, what do you do? If you have a spare RFT, you pay the shop to mount it and you continue. If you have a mini spare, ditto. If you have neither, you wait hours/days for one to be shipped. Having a place for an unmounted 5th RFT would be a nice accessory and design hit need only be what it takes to accommodate the accessory for those who need/want it.