Tire rolling resistance (copied from another forum).

[shoe128]

(10-28-2018 )schISM Wrote:  A few weeks ago I swapped out my 726EL’s that were down to 5/32’s to brand new XDN2’s. At the same time I replaced the drums/brakes and recalibrated my speedometer(went from tall to low pro). I figured my 7 mpg average would lose a few tenths, no big deal but I’m struggling to get more than 6.2-6.3, and sometimes less than 6. I’m really thinking next spring of getting some straight treads and having two sets of tires. Bad mileage sucks.

id be happy tostart with 6.3 or so
asim only getting 5--5.2
2016 ih isx15 342gr 18b
ya i run hard and heaveyyy but i get the same bob tail
imlooking in to it a little bit at a time
thats only .3--.5 more than my old89 cabover pulling up to 150th