uat75035

Does the 20" give better handling or it's purely for the look... I've heard from somewhere that 18" is better for off road but that is not something I do often. If 20" give a more responsive handling then I might upgrade otherwise I might not.

Luap

Tiny bit better handling but only a professional race car driver will notice .

It's 99 % for looks

Makes for a bumpier ride , too

I what to trade my 20 rims/tires for 18 inch rims/tires , if anyone is interested who lives in Arizona

My 2017 F 150 STX is being delivered today , tires are new with only a couple of hundred miles on them

stormsearch

20" tires tend to be more expensive than 18's.

acdii

Try 17" to 20". LOL Sidewall is the main difference between them. On the 20" tires, there is not a lot of sidewall, so you get a stiff ride, but better handling. You also sacrifice load carrying capacity, there are not a lot of LT type tires in the 20" range.

The 18" tires have quite a bit more sidewall, so you get a softer ride and can handle more weight.

The weight handling is critical if going over rough roads with a heavy load since a hard strike can damage the rim on the 20, where on the 18 the sidewall can deflect it. There are also more choices for higher weight rated tires. Downside is the higher sidewall also deflects more while cornering, so the handling suffers.

LSchicago

I switched the 18" rims my 13STX came with for a set of 20" sports off a 2016. Huge difference in handling. I mean it actually corners now instead of leaning. The stock 18" Michelin's were $800 to replace, vs $520 to replace the 20" Hankook ATM's the new wheels came with. Huge improvement in handling, slightly worse ride, and much lower replacement tire costs gives the win to the 20's. They look better too.
On Edit, my 18" tires were 30" tall, the 20" tires are 32" tall, so the same sidewall height for the tires.

Rodsf150

If you don't plan on getting aftermarket wheels, I think the 20's look way better in my opinion.

Ricktwuhk

2 more inches is nothing to sneeze at...

leikos

I wish I could get 16's. It's a truck.

idrive

iTrader: (3)

Most all the posts are pretty much right on.

Off road performance the smaller rim with taller tires will generally work better.
Street performance the larger rim with tires that are not as tall will handle better.

I do believe when it comes to towing that you can easily get the same rated tire with any size rim. Still plenty of tires to choose from in all sizes and load ranges.

Unless you're trying to fit a specific use it really comes down to what you like best.

Scott91370

Largest payload is made on these trucks with the 18" rim.

I'm swapping to an 18" once these tires wesr down, I'm looking for more sidewall. It's a truck not a sports car.