My gravel bike has 27.5x1.9 GKSK. My tubeless version has had tubes since day 1 (over 1.5 years ago). I'm 155# and will run the GKSK as low as 20-23psi. At this psi the tires are a little sluggish on the paved part of my rides (some rides I'm on pavement for 50-70%), though are generally cushy enough for the gravel and occasional non-tech mtb trails. My mtb mind says I can run even lower psi and make the gravel more cush, but am I going to be more sluggish on the pavement?
Put another way, if I were to run these tubeless and at the exact same psi, what (if any) would be the effect on pavement?
I'm not thinking of this from the flat protection (thorns, pinch flats)...I realize that benefit, but where I ride this is less of an issue.