Understanding Tractor Tire Sizes: A Comprehensive Guide

Tractor tires come in a variety of sizes and styles, and understanding the size of your tractor tires is essential for finding the right replacement. The width multiplied by the aspect ratio gives the height of the flank, so 380 x 70% = 266 mm. Therefore, the sidewall height of this tire is 266 mm. Finally, “24” is the rim diameter in inches.

An example

of tractor tire

sizes expressed in the standard format would be “14.9-42”. The “14.9” means that the tire is 14.9 inches wide and the “42” indicates that this tire fits a 42 inch diameter wheel. The hyphen “: indicates that the construction of the tire has a biased layer, but could be an “R” if the tire is radial. The

tire numbering system for lawn tractors

with three numbers works a little differently.

The first number before the “x” indicates the diameter of the tire when inflated and not under load. The intermediate number between the “x” and the “-” indicates the width of the tire. The last number indicates the width of the tire. Keep in mind that the last number is the width, not the diameter of the tire.

This is always the case with the three-number sizing for lawn tractor tires and other tires for garden equipment. When it comes to choosing parts for your worn tires, it's important to understand your options and adapt them to your needs, since what your tractor comes from the factory may not be best suited for what you need today. Once you have determined your tractor's tire size, you can use a Databook to find a tire with a similar diameter and section width. As a Tractor Tire Pro, it's my job to help people find the right tires and tires for their tractor, skid steer loader, trailers and any other type of equipment every day.

Tires are usually bolted or attached to an axle hub on most tractors, skid steer loaders, and other machines where real tires are mounted. Many tractors still come standard with tinted tires, mainly as a cost-saving measure, but also because of their stronger design, especially on the sidewalls, which makes them more resistant to punctures than radial tires. Positive offset occurs when the hub mounting surface is more oriented toward the outside of the wheel, causing more of the wheel to be closer to the tractor. Replacing a damaged or worn tire on a lawn tractor is easy to do and much easier than taking it to a dealership or local repair shop for repair.

When your slippage starts to increase, it's often a sign that you should consider replacing your tractor tires. If you need a new tire and a new tire for your tractor, machine, or trailer, unfortunately, knowing only its size only helps us with half of our answer. Negative offset occurs when the hub mounting surface faces inward (or towards the hub side) of the wheels, resulting in more of the wheel being further away from its hub or tractor. Most modern farm tractors are 4×4s and changing this size ratio can destroy your gear train.

As if this wasn't confusing enough already, there are actually two ways in which manufacturers can express their tractor tire sizes. To convert skewed sizes into radial sizes for tractor tires, refer to this chart below.

Jaclyn Svrcek
Jaclyn Svrcek

Freelance coffee ninja. Incurable tv scholar. Extreme music fan. Avid beer aficionado. Wannabe coffee fanatic.

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