I bought some 265/75/16 BFG ATs on craigslist for a very good price about a year ago. They were essentially new and were sold b/c the PO bought them, had them installed, then put a lift on his truck and decided they looked too small. Lately I have noticed my driver's rear tire has a very slow leak. I can pump it up and it will last about a week before it looks low again. This morning it took it into Discount Tire and they said I need a new tire as the puncture is outside the steel belt. It is still within the tread, not on the sidewall, but far enough out that they cannot fix it. Apparently there is no object in the puncture either, just a very small hole.
Other than that the tire is fine with plenty of life left. Any opinions on using something like slime to try and fix the leak? I run tubeless tires on my mountain bike and these small punctures heal nicely. The other option I have is to replace the tire with my matching spare (essentially new) and get a used tire of the same size for a new spare. I want to avoid paying over $150 for a new tire no matter what I decide to do. Anyone else ever encounter a similar puncture and what did you do?