What is the Oem wheel backspacing/offset??

[Fouts]

What is 1.75 inches mean?

44mm is approx. 1.75 inches

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[OngsterA]

Just FYI -- The Mojave wheels have less offset than the Sport or Rubicon wheels, and thus will 'poke out' a little more.
Gladiator Sport/Rubicon: +44mm
Gladiator Mojave: +36mm

More FYI, the Rubicon 392 7.5" wheels are also at +44.5mm offset.
But the other Mopar 392 Extreme Recon XR 8" has a different +12mm offset.

 

[Lunentucker]

The online configurators can be very helpful as well.
I have spent way too much time here trying on different wheels
https://www.discounttire.com/wheel-visualizer

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