I had the swamplites on my king quad and they burned off quick. I'm not a fan of them.
I put Grim Reapers on my Prowler and with over 800 miles of various terrain they still look new.
As far as what size you've got to decide how you want it to look. I went with 27's myself.
2010 Prowler XTZ 1000-
27" Grim Reaper Tires/Home Made Roof/Arctic Cat Mirror/Quadboss Folding Windshield w/ home made support bar/LED Tail-Brake lights//Venom 4000 lb Winch/Amsteel synthetic line/Home Made Doors/Custom Adjustable Seats/Custom Oh Crap bar for passenger/Tonneau Cover/Fat Max storage Box in bed
Tiger Tail Towing system