I'm thinking about getting some rear tires on Douglas .190 rims. So I have a few questions. I'm deciding between the 18x10x8 Razrs and 18x11x8 Turftamers which do you guys recommend? I was thinking the razrs would last longer and be worth the extra money. If I get 18" tires should I put a 14 tooth front sprocket (stock is 13) or would it be fine the way it is? I mostly ride on my 4 acre track with 2-3 foot jumps. I'm saving the stockers for the snow and trailriding when I need ground clearence.