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Tires/Wheels Cont.
Consequences of Unmatched Circumferences
• Vehicle won’t drive straight, pulling to either the left or right side.
• Tracks receive improper tension and may work themselves off the tires, also known as “throwing a track.”
• Increased wear on the drivetrain.
• Uneven tire wear.
Matching Tire Circumferences
1. See Raising the Mudd-Ox under Jack Points. If tracks are installed, reverse steps Installation under Tracks
then raise.
2. Now air up the tires.
A. If using tracks: 12 psi
B. If not using tracks: 5 psi.
3. Next is to find each tire’s circumference at this standardized air pressure. Use a piece of paper to make a list #1-8
which represent each Mudd-Ox tire as shown in the Figure-3 diagram.
6. Repeat steps #4-5 for the remaining tires.
7. Now you have an overall circumference of each tire at the standardized air pressure. Find the most common
circumference to use as a baseline for matching all (8) tires together. For example if 85” was the most common
number, that would be the dimension to match.
4. For tire #1, wrap a flexible tape measure completely around its outer diameter. For an accurate reading, keep the
tape measure exactly in the center of the tire and as straight as possible (Figure-4).
5. Where the ends of the tape measure meet, note the overall circumference (Figure-5). Write this number down
on the piece of paper.
11335577
22446688
Figure-3
Figure-4
Wrap tape measure around
Figure-5
Note the circumference
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