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20" wheels, How tall a tire can you safely go?

Old 09-03-2009, 10:54 AM
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Default 20" wheels, How tall a tire can you safely go?

I just put 20" American wheels on my 09 R/T. I have 245-45- 20's on the front and 255-45-20's on the rear. .
I still want to fill the rear wheel well more. How tall can I go and still not have any problems. One guy told me 275's are OK.
Can anyone help?
Thanks......New to this board

Last edited by radke701fc; 09-03-2009 at 01:05 PM.
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Old 09-26-2009, 12:34 AM
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You're asking about tire diameter. "275s" refers to tire width. Without the aspect ratio (275/40, for example), you can't know what the diameter is. Taking the example as a starting point, a 275/40-20 happens to be virtually the same diameter as the standard 245/45-20. That's why they're a popular upgrade for the rear end. Apparently though, they won't suit your purpose of increasing the diameter. Sorry I can't help you on the maximum diameter that will fit, but it will depend somewhat on the width that you chose...
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