does any one know what the back spacing on my stock charcoal 17"s are

Thats a great question. This reply is so I can get notified if and when you get some answers.

I think I have the same wheel, just the chrome or silver version. Can you post a pic and or a chrysler model number?

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'07 Ltd 3.7L, Black, OME HD's, OME shocks, Mopar Skids, AEV Bridgers w/ TPMS, Kumho KL78's, ARB Bumper, KC 130 Watters, Warn M8000 Winch, Rock Lizard Gecko Roof Basket KC 150 watters, Cobra 75WSX, 3 ft FireFly, RL Super Step Skinks

Take the spare off and measure it. Lay a stick across the rim at the back, and measure down to the mounting face.

Pretty sure all stock rims on a liberty are 5.5 BS.

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They're 5.5" backspacing. I have a set of the 17X7.5's sitting in my garage right now and I've measured them.

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June 2001 Liberty Limited 4X4
Frankenlift II Premium, Al's Upper Arms, 245/75R16 C Silent Armors on Moabs, RL Skink Super Sliders, Rear DTT, Riddler Diff Cover, Fastman Throttle Body, Profinish-Proglass Hood, Borla Dual Outlet Exhaust, TransGo Reprogramming Kit, APS Stall Converter, 4.10 Gears, B&G Chrysler PCM, Lots of Line-X, etc...