Originally Posted by
terrymorse
Higher pressure will reduce rolling resistance on a smooth surface. On real roads, a lower pressure usually reduces rolling resistance, as it absorbs bumps (as well a giving a smoother ride).
Lower pressure will only reduce rolling resistance by absorbing bumps up to a point. If the tires are bouncing as you pedal, the pressure is far too low. Flexing of the sidewalls
increases rolling resistance.
Additionally, rider input and technique factor into the equation. Everyone seems to want to ride a bike as if it is damned sofa…with their posterior planted firmly on the saddle and then wondering why the bike rides so “hard”. Riding a bike is more like riding a horse. You don’t plant yourself in the saddle unless you want a very uncomfortable ride. Legs and arms provide suspension on a rigid bike (and on a suspended bike) and they do so to a larger degree than a relatively tiny air filled bladder.