I have 3 older bfg ats on my truck and a newer one in the front right, all of which are the 33x12.50r15 size. My problem is that the older left front tire has bulged considerably on the tread surface. Between the treads there are 5 rips, each one showing the second layer of rubber(or whatever the compound may be). It causes my truck to wobble and head right rather than straight. I am thinking about upgrading tires, but can not afford 4 new tires. I have tohught about going for 33x14r15 boggers in the rear for mudding, and using both of the old bfg rears up front, and the newer bfg as a spare. Or should I just buy another Bfg At and mount it where the buldged one is. I rarely do freeway driving, and only use the truck to drive to high school(which is only 2 miles away on our city streets)and in the winter i use it for both street driving and mudding. Can I expect to get good wear out of the boggers, or should i just save my money and buy one new bfg and call it good. Any advice is greatly appreciated.