Could 10 year tires really be safe?

I'm surprised that you have not heard that you are three years past due on replacing as most do so by 7 years. I went 7 years on my front tires and 10 on the rear, BUT I put almost all of the miles on them and used them often and never hit a curb or anything in the road... lucky. I might replace the fronts and take a good look at the removed tires... no cracks even between the tread ribs. If so then take a good look at the rear tires BUT you are risking damage to the MH that will be more than a set of new tires.