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Old 08-11-2019, 02:42 PM
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Join Date: Dec 2015
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How wide is wide enough?

Hello Jeep lovers,

Want to share some thoughts on the matter and see what you think.

Rolling resistance is smallest when the tire deformation is smallest (less deformation means less energy goes into heat). Smallest deformation will have a contact patch with the form of a circle, i.e. flotation tires (one that ends with LT) as their contact patch has a ameboid form. For non flotation tires the closest to circle will be square surface patch. If we take sand for example to have a good flotation one need to run about 0,7 bar. If the truck has weight of 750kg per tire that means a contact patch of 750/0,7=1071 If we take square root makes 32,7sm, or 12,88í wide tire. Making a reality check by looking at competition tracks about 2,7 tons run 37x12,5 inch tires so theory is confirmed by practice.For flotation tire to have circle contact patch you need 14,5 inch wide, as area of circle is 3.14 times r times r.

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Old 08-12-2019, 02:52 AM   #2
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All I'm seeing is a whole bunch of blah blah blah

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Old 08-15-2019, 10:02 PM   #3
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If you were running on a perfectly flat and consistent surface, you might be able to realize some benefit using your analysis... But we drive on an ever changing surface with the tire deflection almost never in a constant state.

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