Will 26 inch rims fit on a jeep liberty or dodge nitro?

No, 26-inch rims will almost certainly not fit a Jeep Liberty or Dodge Nitro. These vehicles are designed for much smaller rims, typically in the 16- to 18-inch range. A 26-inch rim would be far too large, causing significant clearance issues with the fenders, suspension, and potentially even the brakes. You'd need major modifications (likely impossible without significant custom fabrication) to even attempt to fit them, and even then, it would be unsafe and impractical.