The one time I got a flat was in my CVPI, right after I bought it. The seller had even said, "the spare is good" (it was an old winter tire) "but I don't know where the jack is." He said he had taken it down to Discount tire right before I picked it up and had them check the air in it. They found a leak in a tire. A bad valve stem so he had them replace it. I could see the new valve stem.
Thankfully, the jack was hidden under the spare. The tire had failed because the valve stem had failed. It was broke open about 2/3 the way around. It went quick. Stop leak wouldn't have helped.
Both of Vics have full size spares. I keep them aired up to sidewall maximum of 44psi. Reasoning is I can adjust it down to correct level easily enough, airing it up is a bit harder.
Thankfully, the jack was hidden under the spare. The tire had failed because the valve stem had failed. It was broke open about 2/3 the way around. It went quick. Stop leak wouldn't have helped.
Both of Vics have full size spares. I keep them aired up to sidewall maximum of 44psi. Reasoning is I can adjust it down to correct level easily enough, airing it up is a bit harder.