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Old 09-04-2016, 02:26 PM   #1
Join Date: Nov 2012
Posts: 1
Recommended tire size for tow vehicle

Looking to purchase new pickup. Present one has 17 inch tires. New Ford F-350 vehicle comes standard with 18 inch tires but option to upgrade to 20 inch along with fancier rims which I'm leaning towards. Present vehicle pulls 5th wheel level while keeping proper distance from RV to box but concerned that larger tire may increase the height of the hitch and cause RV when hitched to be unlevel. Any reason to not get the larger tire? I'm interested in what most of you are doing in that regard and why. Would larger tire also improve gas mileage?

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Old 09-04-2016, 03:38 PM   #2
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Join Date: Feb 2016
Posts: 166
Recommended tire size for tow vehicle

With Chevy I know that with 18's or 20's you end up at the same point. The 20's tires have less meat on them so the diameter ends up being nearly identical to the 18's. I'd imagine the 17's work the same as well. If not, the OEM would have to recalibrate each speedo based on rim option.

I've got 18's on my current truck. Had 20's on the previous truck. I cannot tell a difference from a functionality stand point. Only other factor to consider is whether or not there's less options in E rated tires from one size to the next.

'16 28DBUD
'16 2500HD Dmax
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tire, tow vehicle

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