Quote:
Originally Posted by fredrick
.....Does anyone know if you have stick to 215 55R17? When I was shopping it didn't occur to me that I might be able to get a different width. Some popular tires don't seem to be made in 215 55R17.....
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Here's the way (formula?) to get correct size so tires don't revolve significantly more or less per mile, which would throw off your speedometer, odometer, computer, etc.
If OEM is 215x55x17
215 = width of tire
55 = height of sidewall
17 = diameter of wheel tire sits on
... 215 x 55 = 11825
if you want wider tire then you need to cut down sidewall height -
next step down is 50 series:
11825/50 = 236.5 so if you can find a 235x50x17 tire, it will work.
also for 45 series
11825/45 = 262.7 so a hypothetical 260x45x17 -- or maybe 265x45x17 would work.
HOWEVER - using wider tires is limited by the width of the rim you are using.
If rim is say 6" wide then maximum width of tires you can use might be 195,
6.5" perhaps 225, 7" perhaps 240 ???
You'll need to look up what the car came with and what maximum is.
ALSO remember that shorter the sidewall, the stiffer the ride, and that potholes are more liable to damage tire and/or wheel with "short" sidewall..
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