Originally Posted by Pocket-full-of-gold
Father and son.
You got that right.....still scratching my head there.
The way I see it, every two miles they line up (ridden the bike for 1 mile and walked for a mile) so at the 4 mile mark the two are at the same place. Then the first character gets to use the bike for the final leg and the second person is still walking. The second person is not a loser because he or she had more chance to appreciate the countryside.
However, if person #1 fell off the bike in the final leg, then person #2 might be first there, especially if a performance enhancing drug like caffeine was consumed (yes, a shameless attempt to get a response to my hitherto-ignored dumb question)