Mine looked great at 6 years when I recently replaced them a few months ago…, now they Are great.
I don’t think they would all explode/come apart at once, but the damage that?could occur to the coach should one of the rears fail could be catastrophic, even if it happened on an empty highway. Add to that the risk to personal safety to others on a?busy highway and it becomes a no brainer.
If you ask a tire professional they will tell you that it doesn’t matter if the tires are still sitting on the rack, wrapped in cellophane, they shouldn’t be used after 6-8 years.
