I have a 2001 f350 and I wanted to put 40 inch tires and 20 inch rims. I don't want to lift it more than 8 inches and I don't want them to rub anywhere except the bumper, I'm willing to cut it. Any ideas. And if you have pics of your truck can I see them

 

Welcome to FTE!

Just a heads up for you. 40" tires will completely destroy the longevity of your truck. If you have high millage ball joints and wheel hubs expect them to go out within 6 months. I have a 6" lift and had 37" tires on it (went down to 35") within months of doing the lift my ball joints went then not long after my wheel hubs went then it took a its toll on my axle U-joints and drive line U- joints then I had to build up the transmission. If you don't know how to do any of the repairs yourself and take it to a mechanic you'r looking at some serious coin. FTE can help guid you through the repairs as well.

 

I have not had too many issues with 37's but you never know. I have replaced U-joints one time and ball joints once so far. I did switch out my hubs but that was to put on Warn's and not because they needed it. Now that I type this I suppose my front end will fall apart as I just jinxed myself. Anyway, I would suspect that 40's on 20" wheels with an 8" lift are going to rub on the springs. You can talk to your local 4x4 shop and see what they can do for you but I don't know of any 20" wheel that will run large tires without rubbing. Once you go 38 or larger, you go into a whole new world of issues for a daily driver. You will need to mod all kinds of stuff in order to get the right angles on things to make it run properly. Additionally, if you go 40" tires you might need to have your gearing in the high 4's or low 5 range to have any power out of it. One last issue is that many 40" tires are rather soft and these trucks are hell on soft compound tires on the street as they can be very heavy up front. Driving around town is not bad even with my 37's but if I go for a long drive/trip with winding roads and hills my tire tread has more waves in it than the Pacific Ocean. Every other tread will be all shaved down as the truck skips along.

 

IMG 1650

Here is what 37's with a 6.5" lift will get you. Not trying to change your mind as you can jack it up as high as you want but going 40's is a real commitment and requires diligence in the preventive maintenance routine

 

Ooooh That's purdy!

 

38x15.5s on 20x12 rims and an 8" lift. You're going to have to cut the fenders and bumper. Depending on how wide you want to go with the 40s it's guaranteed you're going to rub the springs at full lock. Have fun replacing your hub assembly every year (I could do mine in an hour and a half start to finish) and invest in a good quality set of pads. If you have a Dana 50 you're asking for trouble. If you have a Dana 60 you're good to go. And ladder bars are an absolute must! Even at stock power levels, Spicer Ujoints are going to be your best friend. My tire and rim combination weighed in at 149.9 pounds each not including lug nuts or center caps.

4:56 gears are what I recommend if you plan on using it as a truck still. You can easily get away with 4:10s if you're not towing constantly. 3:73s is what I ran and was going to go to 4:56s on my 38s then I blew the Dana 50 apart.... Sold the truck

 

Thank for all the info. Really changed my mind in not getting 40 inch tires no more. Nice trucks everyone. Could you fit 37 or 38 on a 6 inch lift?

 

I saw this truck on YouTube it says it running 40x20's but it looks to short and the tires look smaller. Can anyone tell how many inches is lifted and how big the tires are.

 

Those look more like 37-38's on a six" lift, hard to tell in that picture.

Here's my romper. 37x14½" TerraGrappler's with 20x12.5" wheels on a 10" lift. Not my first choice in a setup but it had low miles and was a good price. I bought it almost 3 years ago, it had 40" tires. They were ridiculous. The TerraGrappler's are a very nice all terrain with a lot of grip in the sand. The best part is how quiet they are on the highway.

 

Nice truck I want something like that but with a smaller lift the 10 inch lift looks good but I want a 6-8 inch lift

 

Thank you. Something else to think about too is the ride quality. My lift utilizes lift springs & shackles in the front, lift springs and blocks in the rear with traction bars, it's very stable. BUT my ride quality is in the toilet when I am not towing. When towing or I have the bed loaded it rides like my Sequoia. What I am saying is if there is any way to gain the 6" lift and still utilize the OEM leaf springs, your ride quality will be much softer on the kidneys.

A combination of shackles and blocks in the rear along with tractions bars can net you 6-8". The front however will be the problem. I believe you'd only be able to accomplish 4" in the front without swapping the springs. Food for thought, I'm done preaching. Good luck

 

John and I had similar setups. Mine is 37" x18" with a 8 inch lift and flares. Tires rub at full lock turning right.

 

The more I look at this picture I think I need to go up a few sizes.

 

You've got the gearing to go as big as you want. 42x16.5s with a different off set rim would make most drool over that truck.... But how much are you willing to cut is the question

 

Does anyone know of someone with a 6 inch lift with 37 or 38 inch tires? And if you have pics can I see them plz.