Robinson

Hey Fellas,

I have a 2011 Lariat with 18" Aluminum (I remember the day when Lariat meant LOADED!) I'd like to upgrade to a set of 20" King ranch rims I found off of a 2007 (they dont have the King Ranch Logo). A few questions if I may...

1) Would they fit on my 2011 Lariat?

2) Would it effect my Speedomiter at all?

3) Do you think they would have the tire pressure sensor in them that would work with my truck?

4) Anything else I shoud be aware of?

Thanks in advance!

Rob

texasgator

1) Yes they'll fit.

2) Depends on what size tires you put on them. If the diameter of the tire is bigger than the tires you have on the 18's then yes, it will affect the speedometer a bit. Probably not too much though.

3) I don't think the 2007's have the TPMS, but I could be wrong. You'll probably have to use the sensors from your stock wheels. The tire shop will probably charge you for this.

4) If you plan to get tires that are significantly bigger than what you've got, you may need to look into a leveling kit. If they're about the same, then you should be good to go.

Robinson

Thanks a lot! They've got tires on them already. I havent seen them but I assume they are the factory spec size, I'd plan on keeping them that size. I'm not familiar with a leveling kit?

TruckLarry

IMHO, you are better off with the 18's.

texasgator

I leveling kit is basically a spacer that lifts the front of the truck 1-2.5 inches, depending on the kit. It allows you to use bigger tires than you could originally. But if the 20's have factory tires on them, then they should be about the same diameter as the 18" factory tires, and you won't have to worry about any of that. You'll have to talk to a shop about about the TPMS tire sensors though.

Robinson

I appreciate your feedback, may I ask why?

shortride

iTrader: (1)

I swapped my OEM 18's for OEM 20's off of an FX4. There is about .785" difference in diameter between the two tire sizes. Just enough to require the onboard computer to be re-set if you want your mph to be correct. I think the 20’s raised my truck about 25/64” which was almost un-noticeable.

As a rule of thumb it's generally better to leave the stock tires on your truck because that's how the tuning and the entire system on your truck was designed and engineered to work at it optimum performance. A smaller tire diameter will give you a slight torque advantage over a larger tire. Some of us are will to sacrifice performance for appearance.

bajaman

20" wheels have a lower profile tire than an 18" wheel in order to keep the overall same diameter. So...lower profile = harsher ride as there is simply less rubber between the rim and the road. If you do ANY offroading (even say... a country road) or travel pot-holed roads, you need as much rubber between your rim and the highway as possible or you can, quite literally, break a wheel.

Platinum_Sean

That's because you did not chose your tires properly!!

If you have 265 65 18 for example, a tire size of 275 55 20 will have about the same dimensions (within 2%) thus, the speedo, odometer, and overall heaight will be close to OEM. Rims are only 1 dimension.

Re: sidewalls riding harsher- I'd challenge anyone to blindfold themselves, get in to 2 identicle trucks. 1 with 55 profile, 1 with 65 profile and clearly identify the "harsher" ride. Ain't gonna happen.

Use this site to size tires:

http://www.dakota-truck.net/CGI-BIN/TireCalc.cgi

brulaz

Tire selection/availablity is much better for 18's (especially LT metric), and the greater sidewall also gives greater protection against highway pot-holes when hit at high speed.