Correct tire psi! For LT tires with C load range

[popsbronco]

Tire size LT 235 75r15

What PSI should i run on the street! The side wall reccomends 50 psi max.
I think that makes for a ruff ride Can i run these tire with 40 psi with no additional or premature wear?
Is it hard on the tire on the street?

 

[ransil]

The tire says 50 psi at some weight like 2000 lbs, so unless your vehicle weighs 8000 lbs do not run at 50 psi. My Super duty for example says 50 psi max, unloaded I run 30 rear & 38 front and wear pattern still says too much.

 

[broncnaz]

Ditto ransils comments 50psi is just the max you can probalby run about 30 and be good. You may have to experiment with different pressures to get the handling and wear you want. I know my bronco doesnt like over 35 psi it starts to wander at that pressure I usually run about 28 but different brands of tires react differently.

 

[broncow72]

Trial and error.... I run 15 and 18 psi and finally got the right tread wear. Tires are very different. Mine are load range C also, just a stiff sidewall I guess. Still got squishy around 7-8 psi though.

 

[wildbill]

;D ;D ;D You should run 30 to 35 max and it will work good. The 50 is for max load good luck. %) %) %) Bill %)

 

[Skuzzlebutt]

Tire companies do not list a recommended pressure for any vehicle, they only list the maximum safe pressure and load capicty for their tires. Get yourself some chalk and make some broad marks from edge to edge of the tread. Then start your experimenting. Drive short distances and then check your chalk marks. If they're wearing off faster in the middle decrease the pressure a few psi. If the chalks wearing off toward the edges, add some air. Remark with chalk and drive some more, until you find the pressure that causes the cahlk to wear evenly across the whole width of the tread.
The tires should be up to normal operating temperature before your start this, and don't expect the final pressure in the fronts to match the preassure in the rears, tho both right and left on either axle should match each other.

Obvioulsy this should be done on dry, clean streets for best result, and try to have the bronco loaded similar to how it is when you do most of your driving. Changing the wieght and its distribution will chang the results of your experiment.

 

[ChrisinWV]

Somewhere there is a formula to figure this out very closely.
I saw it but can't find it now........
You take the max pressure and the max weight cap, the actual weight on that tire and come up with a percentage value or some thing...........
I wish I had it now and have been trying to find it, so if anyone knows what I am talking about let us know....
Thanks
Sorry I couldn't be of more help.
Chris

 

[Mr Joe]

I run 30 with good results.......

 

[popsbronco]

Thanks Everyone who responded!
I'LL start at 35 psi and go from there.
My only concern is i have a winch and heavyt winch bumper in the front should i maybe go 38 front 35 in the rear??