The air in my tires has been in there for 25k. Does it need changing? Or do I take the air from the fronts and put it in the rears? Please advise.
Changing the air in your tires is waste. But filling them with helium lightens things up. My truck went from 6900lbs to 6500 lbs with 65psi helium in the tires. You just gotta watch and not let 'em float away before you putem back on.
