Well like I said I think it is irresponsible for a manufacturer not to offer one. It would be just like the situation that the White Star Line was in when they decided not to have enough life boats on the Titantic. If you don't want to carry your's, more power to you, but manufactures have a responsibility to offer that even if the tires are supposed to be unflatable just like the ship was unsinkable. I can see your point on not having in your car so then you can race. A valid point.