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Old 10-31-2017, 01:44 PM   #1
BlackSovereign
 
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Downsizing to a smaller rim. 20 to 18.

Hey Guys,

Im downsizing rim size for Winter, what tire size would I need to compensate for the smaller rim? 20 to 18.
Current tire size is
F: 245/40/20
R: 275/35/20

Thank you.
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Old 10-31-2017, 01:57 PM   #2
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Original F: 245/40/20= New F: 245/50x18
Original R: 275/35/20= New R:275/45x18
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Old 10-31-2017, 01:58 PM   #3
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This is a neat resource I've used many times: https://tiresize.com/calculator/

You would need a 225/55R18 for an exact match, or a 245/50R18 to get real close.

For the rear, 245/50R18 for an exact match, or 275/45R18 to get real close.




Typically in the snow....narrower is better.
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Old 11-01-2017, 10:52 AM   #4
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The LT's use 245/50R18 all the way around. I cant imagine a minor tire diameter change is gonna screw with your ABS or stabilitrack. The track rats do much crazier changes.
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Old 11-01-2017, 12:34 PM   #5
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Quote:
Originally Posted by Mr. Wyndham View Post
This is a neat resource I've used many times: https://tiresize.com/calculator/

You would need a 225/55R18 for an exact match, or a 245/50R18 to get real close.

For the rear, 245/50R18 for an exact match, or 275/45R18 to get real close.




Typically in the snow....narrower is better.
Oh my god, I use that thing to death! Such a great tool.
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Old 11-02-2017, 07:43 AM   #6
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Quote:
Originally Posted by RynoSS View Post
Oh my god, I use that thing to death! Such a great tool.
Made shopping for non-OE tires a breeze!
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Old 11-06-2017, 11:03 AM   #7
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Thanks for all your reply guys. That tool is amazing too
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