To mount or not?

Hi I have new tires and wheels that I wont be using right away. There going in storage for up to a year,should I mount the tires on the rims or leave them apart? It will be warm storage in a spare room in my house. Your thoughts would be appreciated, thanks sabre67:thankyou:
6 of one half dozen of the other. I'd mount them. Takes up less space and ready to go when you need them.