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2018 Scat Pack SHAKER in Plum Crazy
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A good way to W.A.G. pressures is, assuming similar overall diameter.
Take old pressure time tire width, divided by new tire width. So say going from 235 at 32 PSI to a 275 ends up around 27-28. I would ½ the difference and go 30.
it comes down to pressure over a contact patch type of thing.
 

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