Best air pressure for a 285/75/16 tire on a 1st generation tacoma

I own a 1998 Tacoma Extended cab 4x4 V6 truck. I purchased a set of 16 inch 1997 Toyota Land Cruiser rims, and then put a set of 285/75/16 Mastercraft Courser MXT tires on my truck.

The tire is rated for a maximum PSI of 80 lbs. I am currently running 60 lbs. PSI in them, and it seems a little rough on a bumpy 2 lane road.

How much air pressure would be the best for the highway?

Thanks

 

Chalk test would be the best way to tell, but I'd say 35 would be where I'd start

 

... 60 PSI... yeah you can let some of that out...

Did you lift your truck to accommodate the larger tires, or just hammer anything the tires touched?

 

No knowledge of that tyre

seems extremely high PSI for normal driving

no less its likely the tyre will ‘ crown ‘ .........................

only ride & wear the middle 60% of the tyre prematurely

 

The best way to determine psi is to use the chalk test. I ended up at 35psi front and 29psi rear unloaded.

 

I ran at 60 psi for years no matter the tire .

Now that I seldom load a 1000 pounds or Tow up to 2000 pounds I dropped the pressure to 30 psi

 

I just run 35 all around.

 

Chalk test.

 

I dropped it down to 35 lbs. PSI in the front and rear and it seemed to drive and ride better.

Thanks

 

You could probably drop another 5 psi down to 30 psi.

I had rubber/TPMS swapped between a set of wheels. During the ride home, I noticed the ride was harsher than usual. I checked the tire pressure. It was over 50 psi, pressure gauge peaks at 50, because the "stick" was push to its stop. Dropped the pressure down to 30 psi, the normal ride returned. I'm on 265/65-17s.

The placard on the driver's door jamb will have a good guideline as a starting point for tire pressure.

 

30psi cold, 35psi warm, and 40psi if towing or hauling on the rears.

Lets see some pictures of the LC rims!

 

Dropping it down some more will only feel a bit better even.

Why don't you do a chalk test as suggested to ensure even and proper wear.

Just because it "feels" good doesn't mean your tire pressure is set accordingly.

 

Yeah, that's way too high. 80 is the MAX rated pressure for those E rated tires, assuming a full weight capacity. An E rated tire can hold something like 3,200 pounds at 80psi. So your truck would need to weigh over 12,000 pounds to need to be at 80 psi. That's over 2x your GVWR.

Most people are in the 30-35psi range.

 

Funny that with the weight I carried The chalk test worked out to the 60 psi that is where the number came from.

 

id like to see what Ur tyres look like when Uv run the last miles

& U take them off

must be worn more in the center tread

 

4 New Tires every fall one of the perks I had for using my Truck for work.Between 20,000 to 30,000 miles a year.

They then went on my 4Runner so if they did wear more in the center I never took notice or any of my tire guys people ever took notice

I got tired of being told many times a day " Your tires look really flat do you ever check the air pressure"

You did notice the post about the weight in the bed and the towing ??

 

i did consider Ur details

running l o w is just as bad or worse

tyre heats up & blows out.......................yet if UR driving.......load .........environs

are reasonbly consistent

a target PSI front rear is acceptable ( changes a bit seaons / weather )

1 size does NOT fit all

for waht i do 32k 2 years NO Wear

 

60 is way too much. I have a 285/75R16 and ran 45 for a long time. Stopped by my tire place and they told me they put about 35 psi in them, so I run that now and it's better. It's still kind of stiff if the back end is not loaded for me, but I've got upgraded rear springs. Thinking I might try 30 in the rear.

 

There is no "best pressure" for a vehicle. Do the chalk test. That is the ONLY way to definitively know what pressure you should have your tires at.

My 3.4 extra cab using 285/75/16 is at 35psi in the front and 25psi in the rear when empty.