[wink]

The real eye-opener for me were that my kinda knobby MTB tires apparently have nearly the exact rolling resistance as my Schwalbe Marathon Plus on the Gravel Bike. So although they're a lot thinner, nothing is gained here at all. (If you assume enough pressure in the MTB tires on asphalt).

[ip26]

I regularly clock 21+ on my knobby, slack MTB on flat pavement, but struggle to break 20 on many other bikes…