need some help on tires and rims.

I have a 02 450 foreman 4x4 and am thinking about buying a set of outlaw 2 tires

29.5x11x14 rear and 29.5x9.5.14 front. my question is how do I know what size rim to get get? I know I need a 14' rim but I see rims 14x7, 14x8, and 14x9
any help would be great

 

The width of the Tire is the measurement across the top. It bulges out to that width from the rim.
I have 7" wide rims with 11" wide tires on my grizzly. So all 3 rims will work.
I would not use a 9" wide rim on the 9.5" tire though.

You will need a lift kit and wheel extensions and for the front especially, so nothing will rub with "Hugh" tires like that.
You will need a gear reduction kit Honda Gear Reduction
No way the 450 Foreman (25hp) has the power to turn those almost 40lbs tires in stock gearing form unless you avoid mud and hills and stay on hard level packed ground.