Getting the perfect tire pressure is, arguably, the cheapest way to improve the ride of a bicycle. It is, unfortunately, also the trickiest one to get right. Depending on who you ask, the answer can be conflicting. Ask road bike comrades, and they’ll most likely tell you to pump the tire as hard as a rock; ask mountain bikers and they’ll tell you to put low pressure that you better ditch the inner tube and convert to tubeless. Even worse, they’ll tell you vastly different numbers, all without any solid argument and calculation to back it up. Is there a way to determine the optimum tire pressure without resorting to rumors and wild guesses?