Tire choice is very important in cyclo-cross racing. Off-road Tubular tires are still very popular; even more so than in road racing. This is, in part, due to their ability to be used at low pressure (22-40psi/1.5-2.75bar) without increasing the risk of pinch flats. Low pressure is desirable because it increases contact patch area which can increase traction on soft surfaces. This increases the risk of the rim bottoming out on the ground, however, and this is a problem with clincher tires because the tube can be pinched by the rim, causing a flat. With tubular tires, this is not a problem, as they cannot pinch flat. The only concern is damage to the rim. Tubular tires also offer a weight saving and the ability to be ridden on even when flat so that a racer can reach the pits for a replacement.