I agree with the others about the sensors on the inside tires, you do need them. We also use them for our toad and have not needed to change the stems. But I do think you need the senors on the toad, because if one of my tires were to go flat I probably wouldn't even notice it.
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Dave, U.S.A.F. (Ret)
2019 Fleetwood Discovery LXE 40M (Big D)
2016 Ford Focus, flat tow
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