a wheel question

I am looking for a spare tire for my rzr S.

Thinking about getting an aluminum wheel to save weight.

Will a 12 X 7 4/156 4" wheel fit on front and back?

I have the stock wheels now.

Thanks.

Any other comments regarding spare tires is appreciated! Doesnt seem like the 4m suppliers have any standard advertised packages, when it comes to spare tires. Or maybe I just missed them.