- 3 minutes to go from 12psi to 26psi with a 35" tire on 17" rims.
- 4 minutes to go from 8psi to 25psi with a 37" tire on 17" rims.
(All very consistent times +/- 15 seconds.)
That beats gas station air by a long shot! But falls short of the times provided by belt driven compressors and CO2 by 3-4x. I didn't time my ARBs (if somebody else has this info, post it up).
There's no deflate functionality and sometimes it'll over inflate the tire by a few PSI. However, this seems to be an issue only with lower target PSI like we have for our Jeeps. I filled my truck tires from 60psi to 75psi and it was accurate each time. Honestly not a huge problem since this is also a common problem with filling manually and only takes an additional moment to let a little air out.
Battery life is impressive. My test wasn't super technical, but starting with a full 12ah high output battery it only used 1 indicator bar after all of the Jeep tires and truck tires.
If it wasn't for the ability to tuck ARB compressors into tight corners of otherwise unused space under the hood or behind seats, the side of this inflator would be impressive.
The best use case i can think of would be for shop use when you can set it and forget it while you're doing something else like an oil change or being portable enough to carry out into the yard. And honestly even I've neglected filling tires because I don't want to lay a hose out and mess around with that over a few measly PSI.
As far as my desired uses of while on the road for my truck and trailer, and throwing in the Jeeps for airing up between trails, I think it might work very well and might replace the ARB compressors. I also don't mind visiting for a few minutes while airing up after a hard trail so I'm unlikely to want the speed of CO2. Additionally I can walk around and inspect my Jeep while each tire fills — something I can't do with CO2 or an ARB, so total time spent post trail rides may be similar to those faster air up options. Although, I'm not ready to pull the ARBs until the Milwaukee inflator proves itself a few more times.