I have a 450 TRX 2005. I have 9 inch and 8 inch rims for it. I go mostly off road with it and it sometimes bottoms out and I find myself pulling it backwards a good number of times each outing. What is a good size tire for what I want to be doing? For front and back? What is a good brand. Sorry if this post seems too generic but I am new to ATVs.