[Gmirza]

Adger that is a very good question. I’m sure the tire manufacturers would tell you their junk. I would think if they’re not dry rotted and held air ok they should be fine. I don’t think comparing them to a trailer tire is a fair comparison. Trailer tires are subject to all kinds of forces on the sidewalls.
I just receive my new MT 27.5’s. The tread depth is .090”-.100”, appears to be more than the Hoosiers, but I never have measured them.