I have only had them for a week so no time to really tell whether they lose pressure. What I WILL say, however, is that the total amount of air in these two small bladders is next to nothing. When adding or removing air, it takes less than a second of air from my compressor to increase the pressure by many pounds, or just a short burst of air released to decrease by many pounds.I probably am just totally used to it now. Still a much softer ride than that unmodified F-150 I have at work.
Also I think air pressure keeps the Schrader valve closed so I worry low pressure would naturally leak more. So nice if you have the automatic pump.
So, honestly, unlike trying to inflate an entire flat tire on your truck, using a small hand pump or bicycle pump would be more than sufficient for these air lift bags, IMO. FWIW, I have a 12-volt compressor that I keep under the rear seat for more serious in-the-field inflation needs.
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