I am liking the look of these Mud Bitch tires. I have swamplites right now, but I want a little more aggressive tire that cleans out easily. I have noticed the Mud Bitch is a bit cheaper than the outlaws. I have 27 x 10 x 12 tires now, if I go to 27 x 12 X 12 tires, can you put them on factory rims? Is there any modifications that I need to do on the bike?