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FREQUENTLY ASKED QUESTIONS

CHOOSING THE RIGHT TIRE FAQ

CHOOSING A TRACTOR TIRE
FIRESTONE TIRES WITH AD2 TECHNOLOGY
FLOTATION TIRES
ISO CERTIFICATION
STUBBLE DAMAGE
PERFORMANCE – EQUIPMENT
WEBSITE
TIRE WEAR
POWER HOP

The No. 1 tire choice on the farm delivers more options for the best performance.

No other brand delivers more tire options – bias, radials, R-1s and R-1Ws – with the industry’s best-performing 23° tread design. These tires offer more traction*, save time, use less horsepower and save more fuel compared to other tire brands.

Ask your Certified Firestone Farm Tire Dealer to help you choose a Firestone tire that works best for your needs and the soils on your farm.

*On most North American soils. Columbiana, Ohio, test conducted on the same field, same day with the same tractor.

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CHOOSING A TRACTOR TIRE

When should I buy a bias tire?
Generally speaking, bias tires are preferred for utility tractors that do not perform major tillage operations, do not spend much time on the road and/or are operated lower hours per year. Factors such as expected time of ownership and age of the tractor may also influence this decision.

What are the best applications for radial tires?
Radial tires have a larger footprint than comparably sized bias tires. This makes radials the leading choice where maximum traction is preferred, especially in heavy tillage situations. They also are more economical on tractors that have more hours of field time. Radials should also be considered for tractors that spend a lot of time on the road. Firestone radial tires with AD2 technology offer a higher load capacity and larger footprint compared to same-sized standard radial tires.

What makes the radial a better "road tire" than the bias type?
Radial tires last up to 33% longer than bias tires on pavement. Bias tires tend to “squirm” on pavement and wear down much faster. A radial will put down a larger footprint than a bias tire. This larger footprint stabilizes the lugs leading to longer tire life on the road. The time a tractor spends on the road has a significant influence on the life of a tire.

Is there a difference in traction from bias to radial type tractor tires?
Yes. Radial tires have a larger footprint than bias type tires and therefore provide more grip. The radial benefits may not always be needed – such as for tractors used for light or non-tillage applications (pulling wagons, hauling bales). Also, the Firestone 23° long bar/long bar tread design is available on most radial and bias tire types – providing superior traction compared to tires with other tread designs. Firestone radials with AD2 technology have a larger footprint under same-load conditions and therefore offer even greater traction than same-sized, standard radial tires.

What is the advantage of the Firestone 23° bar design?
The Firestone 23° bar design, with it’s lower tread bar angle, takes advantage of the added torque delivered by today’s higher horsepower tractors. The lower the tread bar angle, the better the traction – the better the traction, the more fuel and time in the field you can save.

What is the difference between an R-1 and R-1W?
Firestone R-1W tires have a deeper center (25% deeper) tread depth than R-1 tires. Many people assume that the deeper the lug, the better the traction, but this isn’t necessarily true. Several factors, including soil type, play a significant role in the bar choice.

When should an R-1 be chosen vs. an R-1W?
Firestone tire engineers have extensively tested both tire types at its renowned Columbiana, Ohio, research farm. Repeated tests show the Firestone R-1 23° bar tire has a traction, as well as an economic, advantage over the high-angle lug R-1W tires of other brands on most North American soils. R-1W lugs usually have a traction advantage on wetter soils and tillage conditions. R-1W tires generally wear longer than R-1 type tires under normal operating conditions due to the increased tread depth.

Why do some tire brands offer only the R-1W tread type? 
Tires imported from Europe were developed for wetter European soil types. Extensive on-farm research of tire types, tread configurations and bar depth at Columbiana proves that the R-1 tread bar is better suited for most North American soils and is an economically viable option for farmers on this continent.

Does tractor type play a role in my tire choice?
Absolutely. 2WD, MFWD and 4WD tractors have significant differences in the ways they are used, how hard they are worked, and also where and when (such as row crop vs. open field applications) that determine tire needs.

What other factors should be considered when choosing a tractor tire?
Along with tractor type, there are other considerations including expected time of ownership, hours of use per year, type of use, tractor age, tractor type, soil types, tillage practices, distance and frequency of road use, pavement vs. gravel and economics.

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FIRESTONE TIRES WITH AD2 TECHNOLOGY

What is "AD2 technology" and how does it differ from other tires you offer?
The Firestone Advanced Deflection Design (AD2) technology represents a new class of farm tires. Firestone tires with AD2 technology are engineered to carry the same load at a lower inflation pressure, or a 20% greater load at the same pressure as our equal-sized standard radial tires.

How can AD2 technology benefit me?
Along with having greater load capacity, this technology allows tires to run at lower tire pressures resulting in a larger footprint, compared to our standard radial tires. The larger footprint means you can get more traction, which delivers greater fuel efficiency and time savings in the field. You also have the benefit of reduced soil compaction, improved ride and added performance in wet soils.

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FLOTATION TIRES

Why are so many farmers using Firestone flotation tires on their combines?
As combines continue to get bigger, so does the problem of soil compaction. By some estimates, yield loss resulting from compaction can run $10 or more per acre. As a result, a growing number of farmers across the country have started to replace the regular tires on their combines with Firestone flotation tires. Because of the tires' super-wide footprint and low inflation pressure, "floats" help reduce rutting and soil compaction caused by today's larger combines. In fact, a recent two-year study conducted by Ohio State University showed that on a combine, Firestone's 68x50.00-32 Flotation 23° tire caused less soil compaction than singles, duals and rubber half tracks. For more information, order a free flotation tire brochure.

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ISO CERTIFICATION

What does ISO stand for?
ISO is the short name for the International Organization for Standardization, a worldwide organization whose goal is to promote the development of standardization to facilitate the international exchange of goods and services. ISO sets operational and quality control standards for businesses in over 125 countries around the world. The organization's name is not an acronym. ISO is a word derived from the Greek "isos," meaning "equal," which is the root of the prefix "iso."

Why is ISO certification important?
ISO certification is important because it is recognized worldwide as an accepted standard of quality. When companies can accurately document their quality systems, they can compare their systems against a recognized quality standard and improve what they offer to customers. Also, because ISO certification is an understood standard, companies can use it to gauge and select the vendors or subcontractors they work with.

What does it mean to be the first agricultural tire division to achieve ISO certification?
Bridgestone Americas Tire Operations is proud to be the first agricultural tire division to achieve ISO certification. Because the company has successfully gone through the ISO review process and achieved 9002 certification, customers can trust that we have already asked the tough questions about our own quality systems. ISO certification is another first for Bridgestone Americas Tire Operations and proof that the company has taken the steps needed to make its products the Leader in the Field.

Does ISO certification affect the prices of its products or services?
ISO certification does not mean a company charges more for its products. In fact, going through the ISO certification process can help a company reduce its operational costs. And these cost reductions may be passed along to customers in the form of lower prices.

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STUBBLE DAMAGE

Why are my tires suffering stubble damage? How can I correct it?
There are two types of stubble damage: stubble piercing and stubble erosion. Stubble piercing occurs when pieces of corn stalk, bean stalk, cotton stalk, etc. penetrate through the tire and result in air loss. Stubble erosion occurs when pieces of stalk wear through the tread and expose the cords in the tire body. There is a solution. For many years, sunflower farmers in North Dakota have benefited from a device used to prevent stubble damage. A 2" well pipe is suspended ahead of the front tires from a frame with heavy chain links. This allows the pipe to move without hitting the tires. Stubble conditions vary depending on the crop, so the size of the pipe will vary also. For example, use larger, heavier pipe for bean stubble. Fill a larger pipe with sand or concrete for corn stubble. For more information, please refer to Device for Protecting Tires from Stubble Damage. There are also a number of manufacturers offering various types of devices for combines and tractors to knock down stubble in front on the tires.

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PERFORMANCE – EQUIPMENT

Can Firestone agricultural tires improve my tractor performance?
Yes! In general farm use, Firestone’s 23° tread bar angle and long bar/long bar tread design help performance in many ways. Our 23° bar angle delivers traction, 15 percent better than a 45° bar angle.* Our long bar/long bar tread design delivers even wear, excellent traction and a smooth ride throughout the life of the tire. Always be sure to properly match tire inflation to your load to get the most out of your Firestone farm tires.

*On most North American soils.

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WEBSITE

Where can I find the data book on this website?
We've updated and improved the Data Book! You can find it by clicking here, or selecting "Tire Finder" in the main navigation at the right of every page.

Click here to have a copy of the Data Book mailed to you.

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TIRE WEAR

I'm experiencing unusually rapid wear on the front tires of my MFWD tractor. What might be causing it?
The problem could be the result of "lead/lag," a condition found on MFWD tractors that can shorten the life of the front tires and cause wear and tear on the tractor's transfer case. Lead/lag refers to the relationship between the speed of the front wheels and the speed of the rear wheels. If the front tires' speed is faster than the rear tires' speed, the tractor has a lead condition. If the front tires' speed is slower than the rear tires' speed, the tractor has a lag condition. The desired amount of lead is 2 percent, which means the front wheels turn 2 percent faster than the rear wheels. The Firestone Farm Tire Data Book contains information about how to accurately measure and correct lead/lag on your tractor, or you can click here. Rapid MFWD front axle wear can also be caused by misalignment (toe-in) or worn tire rods.

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POWER HOP

My tractor "bounces and gallops" when I tow implements. What's wrong?
If you own a MFWD or a 4WD tractor, you may be experiencing a condition known as "power hop." Power hop is a high-horsepower/high-torque condition characterized by an intense vertical hop or bounce, or a forward-and-backward galloping, which can occur when the tractor is pulling a drawbar-towed implement. Information about correcting power hop when towing implements can be found in the Technical Bulletin section of this website, or by clicking here.

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