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I have a 2014 and I just upgraded from the stock 19's to 20" wheels. The wheel specs are

Front - 20x8.5 +32
Rear - 20x9.5 +40

I'm wondering what size tire I can move up to. I have stock suspension and don't plan on lowering the car at all. Would 255/35R20 and 285/30R20 work?

Thanks for the help as I'm not very good when it comes to wheels/tire firment.
 

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A 255/35 on 8.5" wheel will be fine. A 285/30 would be to wide for a 9.5" wheel. You want a 275 in the rear.
 

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I have a 2014 and I just upgraded from the stock 19's to 20" wheels. The wheel specs are

Front - 20x8.5 +32
Rear - 20x9.5 +40

I'm wondering what size tire I can move up to. I have stock suspension and don't plan on lowering the car at all. Would 255/35R20 and 285/30R20 work?

Thanks for the help as I'm not very good when it comes to wheels/tire firment.
If you have not already set this up, here is a bit more fitment information to assist.

For the front, the 255/35R20 would be a great option, the tire will sit about 3/4" farther out than it does now, (Factoring in new offset and tire size)
For the rear, 285/30R20 would work on the 9.5" wheel however is the maximum recommended width fitment. The new tire would sit about 3/4" towards the fenders. Both should work however there is always the possibility of slight rubbing.
 

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20 x 9 with 255/35-20 38mm
20 x 10.5 with 295/30-20 52mm

Lowered 1/2" & rolled rear fenders lip

No issues!
 

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i run a 265/35 20 up front
and a 305/30 20 out back
lowered and rear fenders rolled, zero issues at full load
 
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