No! not the one around my midsection! I use Specialized Armadillo tires which have the huge advantage of being virtually puncture proof. They also have a huge disadvantage which is that they are virtually impossible to get on a rim using tire levers. I am racking up the miles without any flats so far but it is too soon to replace my current tires. I am considering carrying a Hutchinson folding tire with a Kevlar bead weighing 210 grams, along with an inner tube so that if I do get a flat I wont have to struggle trying to get the Armadillo back on the rim. Anyone else carry a spare tire with them.