..........For all those guys with a "150psi" , 12vdc air compressor , try this at home..........let the air in one tire down to say 50 psi , now , engage your compressor and see how long it takes to get the tire pressure back up to 80 psi , 100 psi(GY G614's) , OR 17.5's at 125psi . My guess , IS , that any compressor is going to get to 80psi OK , 110 psi maybe never and 125psi............forget about it . Just remember , you're sitting on the side of the road , and vehicles will be crusing by @ 80 mph blowing dirt all over you while the boss is sitting in the cab with the A\C.........and every so often she rolls down the window wanting to know WHAT , is taking so long ?, jf