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Old 12-29-2018, 11:33 AM   #19 (permalink)
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Originally Posted by oil pan 4 View Post
Any radial tire will be a massive rolling resistance improvement over bias ply.
I read on a 4x4 forum years ago and found that a fee people will run bias ply for off road. Those guys were saying that they saw at least a 2 mpg difference, this was on trucks that were only getting 12 to 16 mpg.
Bias ply when hyper inflated do roll better than radials because of the very hard rubber compound but they weigh more

My 50 mile range Comutacar uses bias 125/80r13ís which I super inflated when I switch to radials I lost range even at 60psi.

I think itís a case by case basis
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