What are the benefits of going from 25mm to 28mm tire? I went from a 23mm to 25mm tires on my '07 Tarmac Expert. The change was a blessing as I was able to do everything with more confidence. A part of it was for going from Gatorskins to Grand Prix 4000s II. Now that my Grand Prix are about to be worn out, I'm considering to going to 28mm versions. I know that my frame and brake callipers can clear the tire, however I'm not sure if I will gain any major benefits. I do a lot of climbin and try to stay off the flats.
Here are some benefits:


less chance of snakebite flats
increased ride comfort on rough terrain
less frequent tire inflation to maintain pressure (because of greater volume of air)
ability to carry greater weight