Hello,
I’m new and have a question that’s probably answered a million times in a million different places on here but I’m still struggling to find it.
I have a 2010 Platinum with a 2” level, stock 275/55/20 tires, and the 5.4L with the 3.55LS gearing.
I’d like to go a touch bigger on tire size mainly for looks. I’d like a little more aggressive look.
I do live where it snows and drive down roads that may not be plowed real well in the winter. I like the occasional off road journey to a hike or to find a fun trail. I don’t want to bang up the truck though. I may tow occasionally a dump trailer to get some firewood for the winter, but don’t have anything I tow regularly. I mostly drive city and highway miles.
There’s my back story and information on use of the truck, now for the question.
I’d like to go with a 275/70/18. This is a 1.3 inch bigger tire. I don’t really want to decrease acceleration and towing a ton, but I also don’t hot rod around. I want to keep the truck going as smooth and clean as possible for a long time to come. I don’t want to wear out suspension components or drivetrain stuff. Would I notice a big difference in performance by going to that size, and would it wear the truck out? I feel like I am terribly overthinking this but want to make the right choice.
My 2nd option is to go with a 285/65/18.

Thanks in advance for the help/suggestions.

 

Your 2 options are almost the same. However, I don’t think you’ll regret going with the wider tire. The 285. Once’s you’re at 295/305 and larger, you’ll start to notice a little. The 285 still tucks into the fenders nicely- depending on wheel offset

 

I can give you an idea of what they look like, the tire info is below the photo.

https://www.f150forum.com/f38/tire-w...0/#post7128006

I don't drive my truck hard but I do go into the woods now and then and of course, we get a fair amount of snow in the winter. These tires are the last thing I worry about in those conditions. However, my suspension is still stock, so I can't offer much help there.

 

So, you are switching rims?

 

I figured I wouldn’t notice much difference with the 285. I’d like a flush with fender look with the offset so I was thinking of a +18mm offset.

Spiky, yes I’m planning on switching rims.

Erik, truck looks pretty good with those size tires. I know the 275/70/18 tire is just a little cheaper than the 285/65/18.

If I wasn’t going to notice any performance drop, I’d probably just go with the 275/70/18.

 

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I went with a 275/70R18 with the 3.55 gears and noticed an increase in sluggishness due to both diameter and weight. It likes to shift out of 1st gear quickly and 2nd gear feels like it bogs a bit before it finally picks up. Almost every 275/70R18 and 285/65R18 is going to be a load range E tire, which means it'll be ~8lbs heavier than the equivalent stock-size tire, plus it will be stiffer for a harsher ride. I'll probably go back down to stock size after these tires are done - to me, the slight (basically unnoticeable) change in appearance isn't worth the downsides in driving feel.

 

Thanks for the reminder. I thought I had put it all in there but it’s 2010 F150 Platinum supercrew (siding know they made platinums any other way), 5.5’ bed, 4wd (also didn’t know they made platinums any other way), 2” level, 3.55 LS gearing, 87k miles, in excellent shape. Has tonneau cover, LED headlights and tail lights, but basically stock otherwise.

And I’ve spent hours playing with that tire size calculator thing already.
I mainly want to know noticeable performance effects or any other long term damage that may be caused by increasing tire size about 1 inch.

Laminar,
Thanks for sharing your experience with your performance when changing tire size, this is the kind of information I’m looking for!

Thanks!

 

265/70/18 is a nice compromise if you want a non-LT tire. Same height as the 285/65/18. Much cheaper, too.

 

I just upgraded to 285/75/17 which is basically a 34x11. I have a 2 inch level.
Also, my motor is the 4.6 2 valve and 3.55ls.

you, with a 5.4, don’t have to worry much about anything under 35s, as far as performance goes