I have had my Touring bicycle since early 2014. I am on a third set of tires and only one flat. The first month I had it I had a slow leak. The shop I purchased it from had put the tires I requested on but had kept the crap tubes. I had 2x 26" Schwalbe Marathon Supreme tires and tubes that were to thin when inflated.They wouldn't take a patch. I purchased Conti 26 Freeride tubes that say 26x2.3 to 26x2.7 and they work great. No more internal flats. I live in the high dessert and so far the only goat heads are the ones I pull out of our dogs paws.