Other than in town, I can't remember coming across a rider who did not have what they needed to patch a tire. I have helped out those that had more flats than they were prepared for, helping with CO2, tubes, patches, etc. Almost every time I slow and ask a stopped rider doing repair if they are ok, I get an OK or a thumbs up as a response.

Now traveling on my motorcycle, that is another story. Very few carry tire patch gear and I have repaired my share of others tires on the road.