How To Measure Tractor Tires and Rims

Published on
December 9, 2020 4:15:00 AM PST December 9, 2020 4:15:00 AM PSTth, December 9, 2020 4:15:00 AM PST

Buying tires and rims for your tractor is an essential step in maintaining your machine. Having all the necessary tractor tire and rim information will make purchasing easier. There is a lot of information required to purchase the right tire, so our guide will ensure you have all the information necessary to make shopping easy.


Decode the Tractor Tire Numbers

If you are wondering how to measure tractor tires and rims, a good place to start is decoding the tractor tire numbers. The side of the tire will list two or three numbers to help identify the dimensions of the tire. If your tire has two numbers, the first number is the width of the tire, and the second number is the diameter of the tire. If your tire has three numbers, the first number is the diameter of the tire, the second number is the width of the tire, and the third number is the measurement of the rim. All these measurements are in inches.


Measure the Rim

To measure a tractor’s rims, measure the width of the rim from the inside bead sets, then measure from the outside of the rim from edge to edge. When you are thinking about how to measure tractor tires and rims, it is also important to check inside the bead fledge because many manufacturers indicate the rim size there. Often, the first number will indicate the rim’s diameter, and the second number will indicate the rim width.


Measure the Wheel Bolt Pattern

First, you need to determine whether there is an even or odd number of bolt holes. For a 4-lug, measure from the middle points of two holes that are across from each other. For a 5-lug, measure from the middle point of one hole to the back end of the hole across from it. For a 6-lug or an 8-lug, measure from the middle point of two holes directly across each other. Finally, measure the size of the wheel bold hole.


Measure the Wheel Offset

For the final steps, it is time to measure the wheel offset. To do so, measure the wheel from top to bottom and divide by two. This gives you the vertical centerline of the wheel. Then, measure the hub flange. With a positive offset, the mounting surface will be on the outside, with a zero offset, the mounting surface will be in the center, and with a negative offset, the mounting surface is close to the inside edge. Lastly, take the smaller number and subtract it from the larger number to calculate the offset.


Now that you have measured your tractor tires and rims, it is time to shop. When you are considering where to buy your irrigation tires and wheels, it is important to buy from a reliable and trusted company. Dawson Tire and Wheel has unmatched industry expertise and an extensive inventory. Dawson Tire and Wheel is North America’s leading supplier of agricultural tires and wheels. We offer new and used inventory, as well as an opportunity to participate in our used trade-in program. Regardless of your needs or budget, our team at Dawson Tire and Wheel is here to help.