What To Choose For Farm Tire: Radial or a Bias?

Agricultural tires continue to evolve to meet the needs of today’s farmers, but whether to choose a bias or radial tire remains a nagging question. So how do you make the decision of whether or not to save a few extra dollars by staying on older-fashioned bias tires, and when are the features and benefits offered by radials worth the investment? Read on for some facts that may help you feel better about your decision.

hough the technology is nearly as old as pneumatic tires themselves, bias-ply tires still present a viable option for many machines. They are manufactured by lapping multiple plies of rubber diagonally over each other—also called “on the bias”—to create a single working unit. Because of the way bias tires are engineered, the tire’s sidewall and tread are connected and work together rather than independently.

The advantage of bias construction is that it creates a stiff, strong, durable tire with rugged sidewalls, making it a great choice for machines threatened by stumps and rocks, or equipment that requires a lot of stability—for instance, tractors that often drive across hillsides. Bias-ply tires are also typically less expensive than radials. Negatively, the stiffness of a bias tire also means that bumps in the field are transferred throughout the entire machine, diminishing a tractor’s ride quality. And because of the way the diagonal plies transfer movement across the tire carcass, when a bias tire’s sidewall flexes, so does its tread, reducing traction and potentially increasing damage to your field.

Over the years, radial tires continue to claim more and more of the farm tire market. As machinery has gotten larger and more powerful, radial tires have been better able to meet the demands made of them by today’s heavier equipment. Unlike bias tires, radial tires are constructed in two parts that are designed to work independently of one another—the body plies run perpendicular to the bead, and the undertread area is wrapped around the tire’s circumference by radial belts of fabric or steel. The belts create a broader, flatter footprint and provide increased resistance to tread punctures.

One of the distinct advantages offered by a radial tire’s two-part design is that flex in the sidewall isn’t transferred to the tread, allowing for better traction, increased fuel efficiency, and reduced soil compaction and field damage (radials can have a 15-25% larger footprint than a bias tire). All of these qualities ultimately add up to more productivity and efficiency around the farm. Radial tires will also last longer and provide a smoother ride than bias tires.

Similar to the way radial tires came to be accepted by overcoming the limitations of their bias-ply forbears, today’s IF/VF tires are being produced to meet the new challenges facing today’s farmers: namely, larger and more powerful machinery and an improved understanding of the negative effect soil compaction has on yield. Simply put, IF/VF tires are a radial with a sidewall engineered to allow for more flex . Because of this, IF/VF tires can carry a higher load than conventional radio tires. Furthermore, they can be used at a lower tire pressure, allowing the tire to create a larger footprint which improves traction, reduces slippage, and lessens soil compaction.

Of course, for radials and IF/VF tires to outperform their bias counterparts, it’s critical that they be operated at the correct tire pressure—so if you’re going to invest in a good set of radial or IF/VF tractor tires, pick up a good tire gauge at the same time.

AL RASHED TIRES FOR AIRCRAFT TIRE SUPPLY

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