For the sake of simplicity, let's assume we're making a bike for 200 ft. standing sprints. Rules for this hypothetical new event don't require saddle, yet require a diamond frame bike.

Now build your two hypothetical frames, do your 200 ft sprint and measure BB deflection.



oh, BTW, you can move one of the cinderblocks in the 2x4 test, just as we'll be moving the seatcluster while we build our compact frame.