The terms “radial” and “bias” describe the pattern of your tire’s plies. Those are the layers that lie beneath the tread — you won’t actually see them unless you wear through the rubber.

Somewhere between the early tires forged by wheelwrights and the modern steel-belted radial, everyone’s horseless carriage rode atop bias-ply tires. This week’s film is a dizzying tour of the ...

conventional 45° bias-ply), those fibers in the tire casing ... I swapped to the lighter Albert Trail Radial tires, mounting ...