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Mismatched Wheel Widths

335 Views 6 Replies 5 Participants Last post by  ProZach626
The specs on my OEM rims are 18x8.5 and the specs on my new rims are 18x9.5. So far only two of the rims have arrived, and I want to install them on the front instead of waiting for the other two, but I’m going to be running a small stretch. The tires I have on my 8.5 OEM rims are 245/40s and the tires for the new 9.5 rims are also 245/40s. I’m not sure how big of a difference it would make, or if it would be enough to harm the internals of the car since there would be a slight change in the complete diameter of the front wheels compared the to rear wheels.
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This again? Sidewall = 245x0.4 = 98mm Radial difference = 98 - root(98^2 - 12.5^2) = 0.8mm Diameter difference = 1.6mm Subaru diameter diff limit = 2/32" = 1.58mm By the time you get your remaining wheels, there will be more wear = yes it will fuck your transmission. Also, just why? Stretched tires have no performance advantage and 9.5 is a stupidly wide wheel for this suspension. What's so urgent about this that you can't wait for remaining 4 wheels?
Alright thanks, and I was just wondering cuz I thought it would be a bit cool in my opinion to rock mismatched wheels for a bit. And I don’t really care about performance, since that’s not path I’m going with for the car, plus it’s not an absurd stretch unlike what I’ve seen other car owners do.
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