> Rolling resistance is a function of tyre and road surface, not weight. Except the contact surface between tires and the road depends on tire pressure and we

> Rolling resistance is a function of tyre and road surface, not weight. Except the contact surface between tires and the road depends on tire pressure and weight (because it affects the shape of the tires on the road). Increasing pressure can compensate for weight, but only up to some point, and increasing pressure also make the tires more rigid, which makes the cyclist spend much more energy to actively (albeit subconsciously) dampen the vibrations coming from the road (while most of this is done passively by the tires when the pressure is at the optimum level).