Ok! Teaguer, I apologize for the mis-inf. As for you Mike, go by the factory rec. or the max. psi says on the tire. As for myself, I ran 35psi on my 195x50-15 for the last 18years. Lately, I changed to 40psi on 205x50-15. If the pressure is lower than 35psi, I have problems as the little side wall I got damaged the wheels more than once when hitting the bums. I am just telling my experience.