Of course I know about always replacing in pairs etc. About a year ago, I replaced all 4 tires with new Continental LX20s. I have only put about 3000 miles on them, mostly highway, and they still look brand new. One tire (left rear) just got a 4-inch gash on the side wall (unrepairable). So, can I get by just replacing it with a new LX20, as opposed to buying two (saving me about $200)? What does everyone think?