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Alternate Tire Size

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Old 07-03-2021, 07:42 PM
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Alternate Tire Size
Thinking of switching from 20” rims to 18” rims. What tire size would be equal to my current 275/55/20?? So that my speedometer is still accurate. What are my options? Thanks.
 
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Old 07-03-2021, 09:19 PM
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Use this tool:

https://tiresize.com/calculator/

Do the comparison tool.

You'll notice the truck will ride nicer on smaller rims with more rubber.
 
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Old 07-03-2021, 11:23 PM
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285/60 r18.
 
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Old 07-04-2021, 11:33 AM
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Old 07-04-2021, 09:02 PM
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275/65 R18 is also a good diameter match, but 265/60 R18 is not. That would require reprogramming.
 
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