There's another forum that addressed this same subject. One of the illustrious posters there suggested checking the local NAPA dealer for the tool to attach to the valve stem. It has a hose fiiting on it as well as an air bleed. I promptly took that suggestion and purchased one for around 20 bucks. Haven't used it yet. I did have chloride put in the rears some years ago. When a puncture resulted in the chloride draining down the drive and killing the first 4" to 6" of sod along the edge, I decided to go the route of somthing more environmental. I plan on using RV pink antifreeze. Not as heavy, but it'll serve my purpose. I also plan on filling the fronts as well. I find I lose some traction at times while turning.