I doubt you would even be able to do it with the front wheel because of the speedometer sensor. The 07+ wheel would not have the correct casting to fit into the 03-06 sensor. The 07+ models drive the speed sensor off the CVT not the front wheel. The other problem might be the brake rotor. The 07+ has duel rotors and the 03-06 has a single rotor and the bolt patterns probably won't match.
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