I once had a blowout on my dolly, many many years ago. It was late afternoon on a Friday as we were heading out on vacation. The first 2 places I contacted didn't have that size. Thank goodness the third stop did, and stayed open for us. Nice little tire store near Frasier Park. They got me on the road, and I happily paid the bill and gave them enough extra for dinner with their family. For the many years after that where I continued to use the dolly I carried a dolly spare which I would throw in the back of the Towad each trip.