I have a Grand Prix, the stock tire size is 195/70-15 and someone that had it before put 215/65-15 on it, why would they have done that? and could this have lowered the gas milage?
2006-07-25 06:37:53 · 7 answers · asked by ? 2 in Cars & Transportation ➔ Other - Cars & Transportation
technically speaking, the wider the tire the lower your gas millage. why would they have done this? tire size may have been on sale. the difference between the 2 sizes is not very noticeable.
i assume you don't understand how to read the tire size.
215- this is how wide the tire is in millimeters.
65- this is a ratio. it means the sidewall is 65% as tall as the tire is wide.
15- this is the diameter of the hole, the tire fits a 15inch wheel.
anyone who says it looks more aggressive or it has a lower profile needs to check there facts.
the stock side wall is 136.5millimeters
yours is 139.75millimeters. it,s a taller sidewall! the number 65 is a ratio.
why do people feel the need to answer questions they don't KNOW the answer too?
2006-07-25 06:46:45 · answer #1 · answered by vituperative facetious wiseass 3 · 5⤊ 2⤋
What most ppl do when they change the tire size like that is to get the most aggressive or sporty looking tire that would fit on that car without having to go out and buy new rims. That's what it sound like they have done. With it being a 215/65 series that would make the tire look bigger and at the same time give it a lower looking profile. And in most cases when a person venture outside of the factory tire setting and go to a larger tire you will most likely sacrifice fuel economy because of the larger contact patch which provide more resistance and a heavier tire which increase the overall weight. Hope that this helps you out. Good luck. Adub
2006-07-25 13:55:11 · answer #2 · answered by A Dub 2 · 0⤊ 0⤋
215 tires are wider and provide better control, although the ride is more rough with wider tires. Wider tires decrease the gas mileage, but the difference is very small.
2006-07-25 13:47:43 · answer #3 · answered by mmd_774 2 · 0⤊ 0⤋
Maybe they needed tires and that size wasn't available and there was no other tire store nearby enough to drive on the spare tire.
2006-07-25 13:40:01 · answer #4 · answered by Toddacanda 5 · 0⤊ 0⤋
they might have done it cause they were hicks, or maybe they needed new tires and stole whatever they could, and yes it probalby would lower the gas milage.
2006-07-25 13:40:12 · answer #5 · answered by thale138 5 · 0⤊ 0⤋
Isn't it funny that auto manufacturers spend millions of dollars on research to find the correct tire size for any given vehicle......from traction, to correct geometry, only to have some dumb a*s screw it all up because HE thinks it "looks cool"........idiots!!!
2006-07-25 13:54:43 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Maybe they thought those look better?
2006-07-25 13:39:19 · answer #7 · answered by dolphin2253 5 · 0⤊ 0⤋