The term "full-sized spare" takes on a whole new meaning when you drive trucks with 34-35" tires on them. For one thing, they don't fit in the normal spots made available to carry them. Then you may have to consider securing a $500 custom tire/wheel combo wherever you do end up putting it, if you decide to go the 5-way rotation route. There are various aftermarket mounting solutions available, some of which are rather impractical and none of which are inexpensive. Even finding a cheap 34" truck tire to use for a normal spare is a challenge these days.