On a road bike, you will get a pinch flat from running tires that low, where the tube gets cut between the rim and the ground. Recommended pressure always vari

On a road bike, you will get a pinch flat from running tires that low, where the tube gets cut between the rim and the ground. Recommended pressure always varies. With wider tires, you typically must run them lower, since a too-high pressure will cause the tire to blow off the rim.