16psi in the front and 18 psi in the rear ,if you run the same psi in the front the wheel has a dendancy to tuck under and have a lot less traction ,depending on where you ride on loamy soft soil yu can run slightly lower pressures providing its not at all rocky ,in tuff rock infested shit you'd wanna run slightly higher pressures.Always make sure that your valve nut is tight in any conditions
i pump my tyre's up to 20psi then get some1 to let them down slowly untill all my knobs on my tire touch the ground evenly. That way you have all the knobs gripping the surface giving you better ride. That's how i do my tyres it really works for me give it ago.