Oversize tire size for stock 2019 RAM Laramie 285/60/20 ? 5.7

[Van B]

Folks, do ya think I could squeeze a set of 285/60/20 A/T's on my 2019 RAM Laramie 5.7

 

[Ridgerunner665]

I'm looking at that size myself when I get new wheels.... all indications are they will work fine.

They're only 1/2 inch wider and 1/2 inch taller...speedo will be off about 1 mph or so at legal speeds unless you get it calibrated.

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[Fatbob Frank]

I'm running 275/60/20s right now with plenty of room to spare.
I'd go 285/60/20 next time no problem...

 

[mikeru]

Yeah, you shouldn't have a problem with those.

I'm looking at that size myself when I get new wheels.... all indications are they will work fine.

They're only 1/2 inch wider and 1/2 inch taller...speedo will be off about 1 mph or so at legal speeds unless you get it calibrated.

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To be more precise, it's a 1.5 percent difference in circumference. Which translates to 25.4 mph when the speedo reads 25, 61 mph when it reads 60, and 101.5 mph at 100. It's linear. Well within the plus/minus 5% that manufacturers used to allow for with speedometer calibration. Not sure if that's still the case now. I suspect the tolerances are tighter.