I've been thinking about new tires and read with interest some of the posts on this site. Many talk abou the "road hazard" warranties and their abilitiy to have a tire replaced if they damage it. Is there really any value here for us? My understanding is that we need to have matched diameters (e.g. tread depth) on all four tires in a 4x4. If I put 10k miles on a set and damage one, don't I need to replace all 4? I doubt that any warranty is going to pay for all the tires. The problem would become worse the more the tires wear. This would argue for doing a 5 wheel rotation as then your spare would have similar wear to the other 4. This will only help if you damage 1 tire and you'd still be screwed if you damage a second. Am I wrong about needing roughly equally worn tires on all 4 corners?