Originally Posted by
drewtk
I think you have this backwards.
Rolling resistance goes DOWN as you go wider on tires, although I certainly agree that there is such a thing as too wide. What goes up with wider tires is aerodynamic drag.
See the below rolling resistance test of GP5000 tires at various widths. Rolling resistance decreased from 10 watts to 9 watts when comparing a 25mm to a 32mm. In other words, the wider tire rolls easier. Unless there is some aspect of wider tires and climbing that I’m missing.
GP5000 tire width rolling resistance test
Yeah, but at what speed?
I think he meant wider tires = heavier tires. At low speed (climb), I'm not sure how significant is the reduced rolling resistance gain.