What's the thought on a spare tire, needed not needed? A good friend told me to just carry a tube, what? I have a 5# CO2 tank with lot's of pressure so I could get a tire back on the rim, unless I couldn't get the puncture to seal and hold pressure. I'm not a tire repair guru so don't know, if you could get to the inner tire, patch the hole, pull the valve stem and pull the tubes valve stem thru the wheel, and work the tire over the tube then put some air (CO2) to it. You would be in survival mode to get back to the trailer, but is that a viable option?