What about the spare?
#1
#2
If you get 35's for your truck, I wouldn't worry about buying the 5th tire to store....1. Because it's probably not going to mount on the underbody where the stock spare sits...and 2. Because the round-about 31" stock spare is going to do just fine getting you wherever you need to go to get the flat either fixed or get a new tire to mount in its place...
Hope that answers your question..._motes
Hope that answers your question..._motes
#4