There's wasteful forms of friction at the road:tire interface when steering, look up slip angles. And there's always wasteful friction at the road:tire interfa

There's wasteful forms of friction at the road:tire interface when steering, look up slip angles. And there's always wasteful friction at the road:tire interface due to factors like toe and camber, even when going straight. The tire's not a perfect cylinder in isolation rolling perfectly straight down a perfectly flat surface, automobiles are not single-track vehicles. Since we're already in pedantic land, tires aren't spinning in a vacuum, there's friction between the spinning tires and the air around them.