Forum Discussion
Executive45
Mar 27, 2017Explorer III
I rarely have to add air to any of my tires, so I, like many others went with the TST non pass thru system. I've had their system for 8 years now. 3 with the old 510 system, (non replaceable batteries) and 5 with the 507. Satisfied with both systems. I believe they are the only ones with the pass thru system. With that said, to answer your question; How often do you add air to YOUR tires? If often, then consider the pass thru system. If, like most of us, you rarely do, then go with the 507....Dennis
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