Tires: tires, flatspot, motorhome

Question
I purchased tires for my motorhome in May of 2009, then it sat for 2 years outside. I put about 5000 miles since I purchased the tires.
Since the vehicle sat outside do yo think the tires a safe.

Answer
Henry,

If you maintained the pressure in your motorhome, yes.

If not, then there is a question.

But you should be aware that the tires may be flatspotted.  That may work itself out as you drive, but it is also possible that the flatspot is permanent.  You won't know until you have put some miles on the tires.