The width multiplied by the aspect ratio gives the height of the flank, so (380 x 70% %3D 26). 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. This example is actually the size of the tire I have on the back of my 4×4 diesel tractor. 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. Below is a chart for converting the size of your skewed tires to a radial size for tractor tires. The second step in choosing parts for your worn tires is to understand your options and adapt them to your needs, since what your tractor comes from the factory may not be the best tire to do what you need today. Once you have the dimensions of your tractor's tires, you can use the Databook to find a tire with a similar diameter and section width.
Fortunately, as a Tractor Tire Pro, this is exactly what I do for a living: my job is to help people find the right tires and tires for their tractor, skid steer loader, trailers and any other type of equipment every day. As you may already know, the tire is bolted or attached to the 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 the tractor for repair at the dealership or a local repair shop. When your slippage starts to increase, it's often a sign that you should consider replacing your tractor tires. However, if you need a new tire and a new tire for your tractor, machine, or trailer, unfortunately, the size of the tire itself only helps us with half the answer. Negative offset occurs when the hub mounting surface faces the inside (or the hub side) of the wheels, resulting in a greater part of the wheel at a greater distance from the hub or tractor.
More importantly, most modern farm tractors are 4×4, and changing this size ratio can destroy your gear train. As if the gibberish wasn't cryptic enough, there are actually two ways in which manufacturers can express the size of their tractor tires.