Question y'all: Need input on need for replacing tires in tandem or as a single. So, off to work this morning and I find a nail lodged into the driver rear tire of the truck. Tires holding air, so it must have happened sometime between who-fucking-knows and now. Probably need to start inspecting more, but oh well. My thought of course was a simple patch, but Americas Tire advises it can't be repaired due to the nail is right on the border between the initial roll of the sidewall and the main tread. They advise a single tire for replacement. These tires are relatively new, having around 15000 (65k tread-life) miles on them since purchased and rotated midway at 7500. Wear is good, no cupping or feathering. Some rational (?) thought in my head is telling me I should put two on in place of one, so I'm rotating two newer tires with two older tires and replace the janky full-size spare with the remaining good tire. Am I thinking too much into this?