Quote:
Originally Posted by CollinM.
I have been wondering which would be better for fuel economy and safety, a LRR tire or a lighter tire? I have been looking into tires for my truck and I have found LRR tires are about 5 lb heavier than regular tires. I might be able to offset this additional weight by getting alloy/aluminum rims to replace the steel I currently have. Please let me know your thoughts. Thanks.
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You need to read some of the tire threads to get a better sense of what is involved.
Specifically, the term "LRR" is a relative term, not an absolute one. It means "compared to other tires with similar treadwear and traction characteristics, this tire has a lower rolling resistance."
Plus safety doesn't really play into the weight and RR game - except to say that tires with cap plies are less prone to failure - but cap plies only weigh 1 or 2 pounds - and only add a little bit to RR.
And there can be HUGE differences in RR that are largely undetectable unless you actually test for it. That is, weight is not a good clue.