my intuition is that over smoothish, but hilly terrain, mountain bikes fare very well, too, since you get to go downhill for free. once you end up in a talus fi

my intuition is that over smoothish, but hilly terrain, mountain bikes fare very well, too, since you get to go downhill for free. once you end up in a talus field, I think it becomes clear that "efficiency" is gone for basically any creature on land.