A Patch Kit is whats necessary whereas a tire is optional on a Rim!!!For most people a spare probably isn't necessary, I've learned the hard way to be prepared. Our day trips usually take us 60 / 80 miles from the truck in terrain you cant get to with a truck and trailer. We camp out of our SxS regularly, sometimes as much as 7-10 days at a time in Baja, and will often be several hundred miles from our trucks. We carry lots of gear and have often needed it. Our group all have HAM radios in our rigs, and on extended trips a portable repeater. Good communications can be a life saver, learned that the hard way too...sorry to ramble, I'm in California, smoke and Corona starting to wear on me...As info, an old VW jack works well for most SxS...Ride Safe!