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MPG difference 9.00x20 vs 11.00x20

cattlerepairman

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Ditto on the 11.00R20 Goodyear G286. I run the fronts at the pressure recommended by Goodyear (90 psi) and the rears at 65 because I run empty. There is simply no weight on these tires and inflating them to 80 increases the hopping and harshness of the rear end.

The road manners have improved significantly over the 9.00-20 NDTs. New shocks also helped (including the one in the driver's seat).

I cannot speak to fuel mileage as I have the speed conundrum to solve; I see no, zero, difference in my instruments with the taller tires. I GPSed my speed with the 11.00 and it is correct - I wonder if my truck had the matching speedo adapter in it all along.

If anybody needs a brand spanking new 5ton speedo adapter....
 
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