Read a version of that article in Adventure Cycling. I run 26x1.25 Pasela TGs on my LHTs, and had been running them at max sidewall- 100PSI. Without weighing the bikes, dropped pressure to 80 F&R on both bikes. No difference noted in rolling resistance/speed, but a very big difference in ride quality. Checked the wheel weights on mine- I should be running 50 front and 80 rear, but so far have left it at 80 80. Am now in the process of trying to convince so of my "gotta run max, 2 grams will really slow me down" riding buddies.