The sticker is only useful for the stock tyres and the vehicle the sticker is attached to.


It is normal to have anything from 30-36 psi, but it really depends on a number of factors;
1) vehicle weight (or + passenger/cargo weight)
2) comfort level vs responsiveness
3) low profile vs standard vs sidewall stiffness (or XL - extra load tyre)
4) tyre models


I'm running anywhere from 32-36psi on my Satria shod with a variety of 195/50/15 tyres. Some tyres need more pressure, some with stiffer sidewalls can do with less.



I'm more concerned with TS's odd tyre size combo. Must be one of these jacked up Wira's


My general rule of thumb is this. Please use this LOOSELY. Does not take into consideration sidewall stiffness... a normal tyre can take up the equivalent of 1-5 psi of air pressure, even when empty.

My tyre contact patch is about 18 sq inches, so total contact area is about 72 sq inch (4 x 18)
35psi x 72 = 2520lbs = 1145kg

Which is about the weight of my car wet weight + 1 driver.

Factoring the ideal pressure with the help of the sidewall strength for my car would be about 32, but I like it stiffer.