Radial tractor tires should be considered as original equipment on new tractors and as replacements whenever tractor tires are being replaced. Tire Construction Tractor tires are classified as bias-ply and radial. Bias-ply tires contain a laminated cord structure beneath the tread. The cords in an individual layer extend from bead to bead in a diagonal direction. Cords orientation in bias-ply and radial tractor tires.
Radial construction has two belting elements.
First, there are layers of cords running at right angles to the tread or radially from bead to bead. Then, a second set of cords runs circumferentially around the tire. These two cord structures cause radial tires to perform differently than bias-ply tires. Radial sidewalls flex more than bias-ply tires and produce a larger, more stable ground contact area and softer ride. It is an index of tire strength and does not necessarily represent the number of actual plies in the tire.