Originally Posted by
choddo
"lower pressure required = less RR"
Does that follow? My primitive simian brain always associated higher pressure with less rr but maybe less speed thanks to worse effects from imperfect surfaces.
The premise is that for any given pressure, a wide tire will deform less under load than a narrower tire with the same construction, and thus have less rolling resistance. Lower pressure comes into play by improving comfort and road handling with as good or better rolling resistance than a narrow tire on the same surface.