I would never go anywhere without at least a doughnut spare, but preferably with a full size spare because of the driving limitations of the doughnut spare. I've had four flats over the years that wouldn't have been fixed with a can of sealant and an inflator. Two were when I hit bumps or potholes that dented the rim and knocked the tire bead off the rim. The other two were from sidewall rips or blow outs. The sealant plus inflator kit will only fix puncture leaks on the tread resulting from picking up nails and screws. I've had enough flats over the years that I carry full sized spares on both of my vehicles.
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