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16x6 Mefro Steel Wheel. They are sturdy rims which will last. With 16" wheels you will need to use a tire with a lower profile in order to get satisfactory clearance to the rear trailing arms. You may not be able to use snow chains and a spare tire with a 16" rim may not fit in the front spare tire compartment.
With low profile tires you have greater side stability but you need to be more careful with rough roads and potholes as tire and rim can be damaged more easily. In any case you need to have and LT (light truck) rated tire