The elephant in the room is the fact that the rear tire bears a significantly heavier load than the front, meaning that it should be inflated to a higher pressure. I compensate partially by running about 90PSI front, 100 rear, on "28"mm Contis which are about 26mm across. (I weigh 150 lbs.)
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324; 1960 Sieger (2), S/N 42624, 42597
Carlton: 1962 Franco Suisse, S/N K7911
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069