Originally posted by trappermark
My next question is this: the 1.5 tires actually have less max pressure (60psi) than the original 1.9 knobbies (65psi).
Those max pressure ratings are generally a fine work of fiction, drawn up between the tire manufacturer's marketing and legal teams... The legal guys want a real low number on there so people don't get blow outs, the marketing guys want a number bigger than their competitor's tires... Either way there's going to be a large margin of safety built into it, I just inflate mine until I see a little deformation in the rear tire when I sit on the bike.
BTW, the 1.5s sure do look funny on my MTB...get some stares, but they do roll a little easier on the pavement!
Don't worry about them, they're just jealous!