if 5th is the gear he would get into anyway in that distance, then having the other gears makes very little difference.
from teh reading i have been doing, there is a huge difference in the way performance over 1/4 and mile or more work. gearing seems to have less and less of an impact the greater the distance invovled.
on the other hand, even basic aero tweaking, the example i found was a car lowered 1.5inches, seems to show comparitively huge gains. adding several mph to the top speed achieved.
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