tire pressures recommended at RA

not sure I have seen this before. this came from the RA school.

front / rear

Official Ford 38 / 38

RA 32 / 28

street
no towing
or loads 38 / 34

ALL off 28 / 22
Road


Bead Locks 8-9 psi min.

Interesting, thanks for sharing.

saym14 said:

not sure I have seen this before. this came from the RA school.

front / rear

Official Ford 38 / 38

RA 32 / 28

street
no towing
or loads 38 / 34

ALL off 28 / 22
Road


Bead Locks 8-9 psi min.

Click to expand...

So Raptor Assualt recommends different pressure than the manual for street driving? Did they give any reason why?

Also, any reason why the difference in front/rear? I assume it is to give you a little more grip offroad for the wheels that actually drive but not sure if that's right.

fftfk said:

So Raptor Assualt recommends different pressure than the manual for street driving? Did they give any reason why?

Also, any reason why the difference in front/rear? I assume it is to give you a little more grip offroad for the wheels that actually drive but not sure if that's right.

Click to expand...

It's because there is minimal weight on the rears, unless you have a load in it.

Oldfart said:

It's because there is minimal weight on the rears, unless you have a load in it.

Click to expand...

Exactly. To expand, you want the tread to lay flat on the ground for the best traction and tread life. Sine the back of the truck weighs less, you need less air. Put a tonneau, a rack, a RTT, and a decked system on and you better air the back up to 40 or so.

I spent about 15-16 months at very close to factory recommendations, and after R/A began dropping them 1 psi at a time. I paused at 36/35 and 36 / 34 for a couple months. Even so, the middle of my KO2’s is well, well worn where the edges have much more tread. Other users have reported similar.

I’m at about 34/33 now cold for usual street operation.

I did a lot of miles fully loaded with 38 all around, but running around town unloaded, I'm at 34/32. Only 10k miles, so hard to tell by looking at the tires how they're wearing. I'm too lazy to get the micrometer out and measure.

When I get a new vehicle, I always do a Chalk Test.

Get the truck loaded the way you're going to drive it most of the time. Get in an area where you can drive in a straight line for a short distance (couple hundred yards). Air the tires to factory specs and use chalk to make a couple of fairly thick lines across the tread. Drive in a straight line until the chalk is showing enough wear that you know how much tread is actually touching the ground. Adjust the tire pressure until you have about 1/2 to 3/4 inch of chalk remaining on the outside of the tread and use this pressure.

If you're going to haul a load or pull a trailer you may want to increase pressure accordingly.

On my '19 Raptor, I'm running the recommended 38 up front and 32 in the rear. After 22,000 miles and one rotation, the tires are wearing very evenly. Looks like I'll get at least 50,000 miles out of them.

Did the same thing on my '13 SCrew 4x4 and got 65,000 miles on Goodyear AT's. It currently has KO2's on it, they have over 40,000 on them and look like they'll last at least another 20,000.

I'm no Spring Chicken and have done this on all my vehicles for at least the last 30 years with very good success and no tire failures or problems.

Just my experience.

I've ended up at 36/32 and the truck feels great. The only load I normally have is a BAK MX-4, unless I'm going shooting. The steering/cornering feels really good and it rides well.

GordoJay said:

I did a lot of miles fully loaded with 38 all around, but running around town unloaded, I'm at 34/32. Only 10k miles, so hard to tell by looking at the tires how they're wearing. I'm too lazy to get the micrometer out and measure.

Click to expand...

Fortunately for you, Uncle Smurfslayer wasn’t too lazy to break out the micrometer. That’s coincidentally the same time I discovered the inside of the front tires were wearing every other cleat as others have reported. Stealership confirmed they’ve seen it on multiple Raps.

Your approach sounds good, adjust up as needed for cargo and live life.

Oldfart said:

I've ended up at 36/32 and the truck feels great. The only load I normally have is a BAK MX-4, unless I'm going shooting. The steering/cornering feels really good and it rides well.

Click to expand...

It took me a while to not be overly concerned with rolling over the tire in corners ;-) but it’s not as big a concern as I thought it would be. All bets are off when the belt fed comes out, right back up to 38/38, then air down for the ride home.