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Originally Posted by oil pan 4
Imperial size 13 and 14 tires are pretty much dead wheel sizes in the US. Everything has gone bigger, a lot bigger.
Tires need to break in for a few thousand km before they give normal fuel economy. I have seen about a 20% hit going to new tires.
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True. Though 175/70/13s should be the last bastion of 13 incher tires there I bet.
You're correct on the tires, I've driven 700kms and the fuel economy gets better as the initial layers get worn off. I noticed with half a tank that I've already driven as much as the old tires, which got me excited.
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Noice, should lower your revs, especially on the highway.
I wonder about the max pressure for the new tires?
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I use manufacturer specified 36psi (loaded pressure) all around. I still want a balance of comfort and economy. And there are no long stretches of highway here unless you go out of town. Its mostly down to city driving. Night driving is another story though. I can cruise all around town with 4% lower rpm than before.
edit: oh i reread your comment. its max 44psi on the sidewall.