Originally Posted by cachehiker

Size is relative. Hutchinsons, Tiogas, Specialized run big. Contis, Panaracers run small. Both the Hutchinson 2.0's and my Specialized Adreneline Pro 2.0's are physically larger than my Panaracer Fire XC Pro 2.1's so you had better get yourself a pair of calipers if you're going to be picky. I run 155 lbs. and keep the Panaracers at 40-42 psi and the Adrenelines at 38-40 psi. I also run an old pair of Ritchey Excavader/Elevaders at 40-42 psi on slickrock which is below their recommended minimum pressure of 45 psi. Why let the sandstone rip the knobs of my newer tires?