I do not know how they install it but there will be no change in tire pressure due to change in ambient temp. the primary reason for doing it in the first place.
I'll find out more but you know as well as I that you can't vaccume out the tire without breaking the bead so I don't know how they deal with that issue.
Correctly done there will be no more fluctuations in tire pressures for any reason.
For that price it is worth a try, I've got the moniters so I'll know right off if it works.
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