BFG KDW2's

255/35/19 and 285.35.19

I dont see it anywhere on the tire

 

Correct, there is nothing stamped on the tire that tells you the inflation pressure because it varies based on car, weight, suspension, and dozens of other factors. The car manufacturer determines how much pressure the tires should have.

That being said, a good starting place is 35psi, same as stock. You can alway vary it a few PSI one way or the other to adjust the ride and handling characteristics.

 

Many don't fully understand that the 35 psi is COLD meaning first thing in morning [in your driveway before the car moves an inch]measured psi which will go up ~~ 1psi per 10F as the day's heat and highway speed progress...............once set each day the tires self regulate.

The main reason is that cold rain and speed [evap of rain] will lower the psi below 35 psi.

From a longevity and durability standpoint 80% of max inflation [44 or 51 psi] is a better cold starting point.

Obvious an unloaded car rear tire will have 5% less load than the front tire and will overheat less than front since no turning load and less braking load so one could use 80% front and 75% rear.

Easier to just set all 4 the same at 80% of max inflation psi on tire label [44 or 51psi]. COLD!

 

Isn't the tire pressure on a placard inside the drivers door frame?

 

I didnt know if aftermarket tires required more air

 

if you go bigger they require less air

 

I was just being obvious, but the answer is not. As members have mentioned, just begin with 34 PSI, and watch for uneven wear. Adjust accordingly.

 

and in the owners manual

 

please do not post advice, you have no clue what you are talking about. thank you.

 

not true. you set your tires at 35psi cold. the car is supposed to have a cold temp of 35 psi. here is a quick tutorial for those of you who think you know what you are talking about:

http://www.tiresafety.com/

 

I don’t believe it was mentioned, but the PSI number on a tire’s sidewall is the maximum pressure you can put into the tire and is also the pressure at which the manufacturer records the actual tire size.

Of course you would not want to approach this psi value for normal driving. As everyone here says, use the PSI Nissan recommends.

--Spike

 

In the same tires I run 38psi front, 35psi rear.

 

40 front/ 35 rear same tires. During the summer I monitor my tires at least weekly. During colder days I monitor most every day; I lose 5+ psi every other day (depending on the degree of coldness).