webmap.onxmaps.com
I placed an order for these using this link. I have a much more expensive ARB deflator I have used a lot. Last week I was out with a buddy in his Wrangler and my TB. He attached 4 of these things and let it rip while I was on my knees monitoring each tires pressure one at a time. Also, I have checked the trucks TPMS dashboard pressures against a quality gage several times and surprised by how accurate it is.
He had the all brass ones that look like they are 16 bucks on amazon. Don't do it. They are a pain to change the pressure setting. It is a process. These are all for deflation only so I would not worry about the 30 to 40 range. If your going to air down I cant imagine why anyone would air down to more than 30 PSI.
With Duratracks I would only go down to 25 because of the weak sidewalls. I am running BFG KM3 now. An incredibly strong tire. I go down to 15 or 20 depending on terrain.
