Re: Full size spare is different size from other tires
I calculated and it's not quite the same diameter (slightly smaller, 29.6") as the regular tires (30.5")but remember it's just a temp. Ideal replacements should have a diameter within 0.5" so as not to put off the speedometer. I don't know about the TPMS.
BTW, my '02 Overland had same size spare on matching rims with TPMS. The monitor not only displayed the psi of all 4 driving tires but monitors the spare also (low warning).
2011 GC Overland, 4x4, 5.7L, Q-L, 730N, White/Beige. :thumbsup: