truing
n.— «A wheel, he explained, can develop flat spots, and the barn’s special “truing” machine can restore the wheel to working order. A big plastic tub with piles of metal shavings carries the sign “Wheel Truing Machine Chips Only.” The chips look like cheese shavings, though cheese shavings with the density of bullets.» —“Looking at the Subway From Every Angle” by Anthony Ramirez New York Times May 20, 2007. (source: Double-Tongued Dictionary)