The factory 16" tire size is 225/75R16. A 225/70R16 would be almost 1" shorter than the factory tire.
While its possible to run a 225/70R16 on your Liberty a 225/75R16 would be idea. Tires with taller sidewalls perform better in winter conditions and by selecting a tire with the same diameter as your factory tire, you're speedometer, ABS and traction control (if equipped) will also function as expected.
Here's a link to some winter tire options in this size. (Black Friday is next week!) We guarantee the lowest delivered price on everything we sell and we'd love to earn your business.
225/75R16 Winter Tires
We also have plenty of wheels to choose from if you are looking for a dedicated winter wheel and tire package. Please give us a ring if we can help you more. 1.888.459.4080.