My dad once told me of fixing 24 flats by hand on a trip across two states. Of course that was in a clapped out Model T ca 1930 or so. I never got the details but it didn't sound like a very fun trip.
It must have been an experience driving before the 50s when the interstate roads were modernized. Like a bike tire sharp rocks can flatten your tire and there's no AAA to call. You are truly on your own. Scary.