I just installed 4 new Cooper Zeon RS3-A with a maximum PSI limit of 50. What PSI should I keep them at? Big O Tires put them at 35-37 psi. Is that good?

 

there's this little sticker in your door jam that tells you....

35 PSI is OEM recommended. The sensors will complain if any of them drops below 28 - 30. You can run them slightly higher if you want better MPGs, but the ride will be harder. The OEM recommended PSI will be the best balance between comfort, performance, and MPGs.

Of course, the OEM recommended inflation pressure assumes you're not stretching tires.

 

Thanks, ill leave them at 35 then

 

If I remember right, I do 38psi on the front tires and 36 on the rears. That seems like the best compromise between ride quality and MPG that I've found.