If you knew that some imminent doom was about to befall earth and you were charged with the task of constructing a bicycle that would stand the test of time and a ruined earth, how would you build it? What kind of frame material would you use? What frame geometry, color, fork, wheels, ect. Would you stress carrying capacity, speed, durability, weight, or serviceability. You can only use materials and parts we have today, pre-apocalypse. We assume specialty tools are not close at hand and parts are nearly impossible to find.