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#1 | |
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Banned
Drives: '10 Yaris5drHB+99 4runner LTD Join Date: Sep 2009
Location: NE
Posts: 672
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Quote:
no. traction rating on a tire is: how does it stop in wet ? for any given tire size, AA is the best category for wet stopping. wider tires wreck the AA rating. it may help cornering but doesn't help wet stopping. unless it is a rain tire or happens to also be rated AA wider tires ruin mileage --- OP, stick with what you originally guessed. that is the tire |
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#2 |
![]() ![]() ![]() Drives: 2008 Yaris Sedan Join Date: Feb 2010
Location: Oklahoma City, OK
Posts: 323
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The width and/or the Michelin Energy Saver A/S?
As it turns out, P185/60R15 is, indeed, a weird size. The closest Energy Saver is P195/60R15. A 5% increase in tread width, and 2% increase in diameter. I do 95%+ of my driving on the Interstate highway. So the 2% increase in effective gearing is probably a help, if anything. And at 65 - 75 mph, air resistance dominates, accounting for something like 75% of total resistance at 75. As opposed to city driving, which is a mixed bag, but with air resistance figuring in decidedly less prominently. Rotating mass is also less of a factor on the highway. Still, I'd like to stay close to stock. And since I use the GPS and Scanguage as my speedometers, the 2% variance in diameter should be no tribble at all. -Steve |
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