With the new truck on order, I'd like to have the dealer switch out the P-Metric Pirelli 20" tires with an LT tire for the purpose of towing. I expect they'll ride a little rougher, but oh-well... it still won't be like my F-250. I like the BFG T/A's, but have no idea what size tire will fit the factory optional 20" aluminum wheel without rubbing issues. I do not want to install a leveling kit, but I want full turning as I will be cranking a 28 foot tarvel trailer in some tight spots. I'd opt for another brand like Cooper, but I think I'm limited. I like the aggressive T/A tread, and I think they will give some life to the King Ranch over the sissy-looking Pirelli's.

 

I just picked up an o8 with the 20's and had the junk Perrellis taken off right away!

I put on Goodyear Silent Armor 275/55/20.
I love the GY and have had 5 sets so far. At least 55-60 thousand or more out of each set and great in the Mud and Snow.


I was told that 275/60/20 would fit without rubbing........WRONG
We tried a set of these first and at full turn they DO rub at full turn on a stock FX4....and thats sitting still. If you hit a bump with the wheel just right....LOTS of rub.

Stick with the stock size and you will be good.

 

I would also stick to the stock size and also check out Toyo, Nitto in addition to the BFG's. Load range D or E will be great for towing. Look up the company web sites, all sizes are listed.

 

What kind of truck are you getting?

 

2008 F-150 King Ranch 4X4 Supercrew with 150" Wheelbase.

 

I love my GoodYear Silent Armor's in 18". Great tire, and amazing in snow.

 

I'd go with the BFG AT KO, Nitto Tera Grapplers or Toyo AT's but just about anything will be an improvement over the OEM Pirelli's.

 

i was just talking to a fella outta town last week, he put Cooper ST's on his FX4, 275/60/20. looks like a nice tire, he said paid 900 bucks out the door.
BFG A/T's come in 285/55/20 = 32x11-20, they look amazing on the stock 20's IMO

 

How will I know if the BFG's will fit, or present rub problems? It looks like the Cooper's are stock size, so I assume very close to the Pirelli dimensions.

 

Another question... Will I expect a decrease in mileage with the T/A's over the Pirellis? I hate to give up too much with fuel costs today. In fact, I am wondering what I'll lose by chosing the 20's over the 18's.

 

a friends dad has them on his 06 lariat. they look really nice and he says he hasnt seen any loss in mileage. the 20's looks way better and are beoming a more popular tire size than a 18, getting to be a small tire size. trust me get them and you wont be sorry.

http://www.cardomain.com/ride/2946152

 

what size are those bfg's 285/55/20? I've been looking for 275/60/20

 

The 285/55/20 is about a 1/2 inch wider than the 275/60 but its about 3/4 of an inch less in diameter. I am running 305/55/20's on the stockers and my truck is stock height, they do rub slightly at full steering lock so if thats a concern, you want to stay under a 12" wide tire on the oem 20's. As far as diameter, IMO, I would not put anything less than a 33". The stock 275/55/20's just look too small for a 4x4

 

Look at my other posts. I just had the dealer order Michelin LTX A/T2's for my 2008 to trade out with the factory Pirelli's. They came in last week and I stopped in to see them. They are LT285/55R20's if I recall correctly, but man do they look nice. I called Michelin/BFG (same company) to ask what they thought. They said that the T/A's were probably going to be dropped soon, and the LTX will take their place. I was in awe when I saw them as they looked huge. I actually had to go check their size. The guys at the dealer couldn't believe how nice the looked. I'll be getting the truck shortly, so I'll post some pictures then.

 

Looking forward to seeing your pics...