The max air pressure is 70 psi. Warlock runs 30 psi in his one up and i don't remember how much he adds when Cool Breeze accompanies him. I'm running between 30 and 35 psi in mine. Progressive doesn't actually advocate any particular pressure setting. They have instructions on how to figure it out in their instructions on their website. Click here
http://www.progressivesuspension.com/metric/416series/index.html then on the pic under the bikes front tire and you can download the instruction manual.
Marty
