I run 115 - 120 psi in my Specialized Armadillo All Condition 700 x 25s and I weigh about 230# and the bike is a steel touring bike that comes in around 30# depending on the racks and options I have on it at any given time. I will be switching to 28mm when these wear out (which could be a while the way they are holding up). The Armadillos do have a harsher ride so going up a size is probably a good idea if comfort is important to you.