Resistance is futile: How tire pressure and width affect rolling resistance | Velonews

All else equal, decreasing rolling resistance (rr) increases speed. Shorter curves indicate faster, lower rr tires. The two colors on each curve show rr for each tire at different tire pressures, 84 and 112 psi.

Editor’s note: This tech article ran in the November 2012 issue of Velo magazine.
Whether on tarmac or singletrack, a tire with lower rolling resistance reduces the power required to move forward while also providing a better quality ride. The tire absorbs small bumps by not transferring them into the bicycle and rider, resulting in a smoother ride, faster speeds, and better cornering. How could you pass that up?

Read more at http://velonews.competitor.com/2014/12/bikes-and-tech/resistance-futile-tire-pressure-width-affect-rolling-resistance_355085#DO6bCEFRSmZbYXGg.99