Originally Posted by base2

Yeah, the Youtube kept shoving this in my face. Eventually, I watched it. It doesn't have anything new.

He does gloss over the nuance of larger tires have lower rolling resistance for a given pressure. (The reason is the more circular contact patch) But his point of the extra volume & lower pressure making for a smoother roll over rougher terrain does often end up being faster than the same wide tire at high pressure tire deflecting the forward inertia to the vertical plane as is the case with not smooth surfaces is not missed.

Yeah, we're balancing competing nominals. Smooth vs rough. Fat vs skinny. High pressure vs low. Light vs heavy. Supple vs not. That's 20 possible choice vectors to approximate a nominal pressure.

Our infrastructure is terrible. Wider tires at lower pressures is the response...Nothing new there.

FWIW: At 200 pounds, I run 23's at 110 rear, 100 front. I'd run 25's a bit less. By way of experiment: My 41's are noticably faster at 45-50psi than they are at 80psi. So he is right.