You're correct, heat increases wear. http://canyonchasers.net/shop/generic/tires.php "Many riders still believe that running the max psi number listed on the sidewall will ensure you'll get the maximum life out of your tire. But as tire's have evolved this is no longer the case. Running max-pressure, or too high pressures can actually cause the tire to wear out faster. Yes, you read right; keeping pressure higher will actually make the tire wear out quicker. When a tire is over-inflated (and by over-inflated we mean, higher than the manufacturers recommendation) you make the contact patch smaller because the tire is unable to flex as much, this focuses the wear onto a smaller surface, increasing heat and wear. While testing one particular sport-touring tire we ran the tire-manufactures recommended pressure, which happened to be the max psi. The "touring" tire was destroyed in just over 2,000 miles. We obtained a second set, ran the psi at the bike's recommended pressure and literally doubled the life of the tire (riding the same way on the same roads as the first set). So, the morale of this story is to stick to the bike manufacturers pressure recommendations for best results."