So far I did good with 14psi cold and 14 psi hot so....14-18 psi roughly. 4-5 seconds of smoke, nothing abnormal...275/60/15 on an 8" rim. I also rotated them last outing..I plan on doing that every outing. I'm a rookie sharing my info! These have netted me 1.58 on motor and 1.41 on hose. My bests ever.