I just ordered my lift for my 08 f150 slt crew cab 4x4,
I ordered this lift 2.5" 04-08 Ford F150 Pickup 4x4 Suspension Lift Kit with Performance 2.2 Shocks, it is by rough country, it says the recogmended tire size is 35x12.50, I am looking at putting Nitto Trail Grapplers on it 35x12.50x20
the rims im looking at arale Earnhardt Jr. Wheels DJ109 "Cannon" they are 20x10, with 5.5 inches of backspacing. Just looking for a little input on if i will have to trim at all or if they will fit with out rubbing.

 

Well from what I've heard, having that much lift on our trucks you can squeeze 35's with the stock rims. I believe stock rim specs are 7.5" wide with 6" back spacing...I think. With those 20x10's and 5.5" backspacing the tires should stick out 3" further than stock. I'm going to say you'd get rubbing but I could be wrong, hold out for a second opinion. BTW how much was that Rough Country lift?

 

like 250 i think

 

i'm doing the exact same thing, I posted a thread about fitting 35's on the stock fx4 rim
same lift kit too

 

i ended up going with 18x9 w 5.0 backspace dale jr cannons wrapped wit 295x70x18 trail grapplers

 

bit smaller than expected

 

the 9 inch wide wheel will help you clear em better., but i see you went with a little bit smaller tire. you shouldnt have any problems with that setup. Should look pretty good.
34" tire will fill it up nice and not look as stuffed.