I have a 2017 Greyhawk 29MV that came with extensions for the inside duallys. They don't appear to be all that heavy duty and makes me wonder if they are suitable to install monitors on. They are well positioned to check air pressure and to air up. I may be concerned for no reason but would like to hear from some of you guys with newer model greyhawks that came from factory with these extensions and are you using a TPMS on them. I will be using a Pressure Pro system on mine.
I have a 2015 Greyhawk and currently have TPMS on my factory installed valve stem extenders. I use EEZTire brand and logged over 3500 miles with system monitors in place - no issues.
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Jack
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2018 Greyhawk 29MV
2017 Ford Edge w/Blue Ox Setup To Yosemite... and Beyond!