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A better option could be 195/70/15 @ 783 Revs/mi. By moving wider from 195 to 205 you're putting a wider patch on the road and increasing rolling resistence. My wife's Honda Element manualhas 215/70/16s @ 724 rev/mi and I'm investigating 215/75/16 @ 703 rev/mi. It's geared to be at 4000rpm @ 80mph, I could bring that down to 3884 @ 80. I'd rather not increase width though. |
Re: What'd I do to make you
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I went from 175/70/14 up to
I went from 175/70/14 up to 185/70/14 when I replaced my tires last year. I found that I needed to add 5% to my mileage to be accurate. That is why you see some really wierd numbers in my gaslog. My Saturn has enough torque that I can still cruise at as low as 25 in 5th. To do this, the road has to be flat and I can't accelerate much at all.
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Quote:By moving wider from
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then again, the wider tire may let you corner more comfortably faster, so you save energy there ;) Quote:
i *almost* went out and did the run this afternoon, but it was around -13C and the block heater wasn't plugged in, so i changed my mind. unless someone else beats me to it, i'll do it next time i go on an errand run. it's a quick 'n' easy test, and will be interesting. |
just had another thought...
just had another thought... will a car with an auto tranny see an equivalent benefit from going to taller tires as you would see in a car with a manual transmission (=direct engine-to-wheels connection)?
or will the auto torque converter just slip more to keep the engine rpm up where it normally is? |
Yes the wider tires do help
Yes the wider tires do help me corner better, what I do on the freeway is when a turn is at 35mph onto a different freeway i cancel my cruise control and let it coast 60mph in that turn and they hook up great. So do you think the 205/65/15 would be the best choice?? Since it will give me a wider patch and less revs per mile.
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Re: just had another thought...
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Re: just had another thought...
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Did a little research on
Did a little research on tire sizes for the Element.
Stock size Goodyear Wrangler HP 215/70/16 27.8Diameter, 750rev/m. No such thing as a 215/75/16? Replacement Goodyear Fortera SilentArmor 225/75/16 29.3D 714rev/m. So this could drop my rpm from 4000rpm@80mph to 3808@80, 4.8% reduction. But it will also increase tire width 4.7% and raise vehicle height by .75 inch. My guess is it's a wash, anyone else want to speculate? |
Quote:So this could drop my
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