1998 Toyota 4Runner Owners Manual - Page 316

4RUNNER (1998) Rotating tires CAUTION D Do not mix radial, bias belted, or bias- ply tires on your vehicle. It can cause dangerous handling characteristics, resulting in loss of control. D Do not use tires or wheels other than the manufacture's recommended size. Toyota recommends all four tires, or at least both of the front or rear tires be replaced at a time as a set. See "If you have a flat tire" in Part 4 for tire change procedure. When a tire is replaced, the wheel should always be balanced. An unbalanced wheel may affect vehicle handling and tire life. Wheels can get out of balance with regular use and should therefore be balanced occasionally. When replacing a tubeless tire, the air valve should also be replaced with a new one.