What tire size does everyone have to get the best MPG?

 

The larger the tire = the heavier the tire = the worse the gas mileage.

But another factor is the type of tire. Comparing a mud/off road tire and a all season of the same size, the all season will get better mileage.

Weight is the biggest factor and then type of tire.

 

Stock 265x70x17!

 

You'd want the stock size. Lightest tire you can find and a highway tread.

 

This^^ your truck is tuned and geared to be most efficient with the stock tire size

 

Stock

 

Agreed, stock size will give you best MPGs