Originally Posted by D Moffitt
Unless you're also towing and have sensors on the tow vehicle, I doubt you will need to install the "extender" to monitor pressure on just your motorhome. I installed a TST TPMS on my 40ft Phaeton (266" wheelbase) without using the included extender and have had no problem monitoring all 6 tires.
I am using a tow-dolly and towing a 2011 Honda Accord. Was definitely having problems with the rear two tires and spotty issues with the tow dolly, probably related to angles and stuff between the front where I have the monitor, and the rear of the toad...
It did work just fine with the 6 coach wheels, as you said. But the two rear wheels on the Honda are way back there...