Originally Posted by
DnvrFox
Careful there with your assumptions, engineer. Many tests show that at the same pressure, a bigger tire has less rolling resistance. But, as mentioned previously, there are many factors affecting rolling resistance besides tire size.
Nobody said that I'm an engineer, but a tire that, everything else being equal, has greater contact area on the road will have more rolling resistance. Perhaps one could argue this point for a theoretically perfect planar surface, rather than a real road, but for an imperfect road surface, it must be true. Further, a tire with a greater radius of curvature, everything else being equal, have greater contact area on the road.