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I have some POS Primewell PS850 155/85-13 and they are getting me much better FE than the BFG 175/85-13s that came off. These Chinese tires are 460 tread wear rating and I'm having a hard time getting used to the vastly lower rolling resistance. This is strictly seat of the pants data. I always neutral coast at specific places at specific speeds and have noticed that I have a higher end speed at my normal braking points. It has been difficult to readjust my driving to compensate
Although I can't recommend these tires due to their terrible reviews, I can say in the first 800 miles that they are performing well above expectations. This is a very highway-only tread.
I used to think that higher treadwear rating would translate to lower rolling resistance, but a little homework knocked that idea out of my head!
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