I bought these hoping they would work to clear my TankCheck sensors, but getting the TankTire into the tank tray on my 22FB was a severe pain...and as much as I loved having my TankCheck sensors on there, there was just no reliable way to do so. I gave up and am flying blind again for propane level. The TankTire was just too large in diameter to work in my case, I even tried bending the tank tray to get more taper to wedge them in...but it was just not reliable.
I will likely cut something else to make as a "ring" spacer in the future so that my TankChecks will fit, as the TankCheck provided solution is a joke entirely. (OT, i realize)