Quote:
Originally Posted by oil pan 4
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.
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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 125/80r13’s which I super inflated when I switch to radials I lost range even at 60psi.
I think it’s a case by case basis