Quote:
Originally Posted by stugray
Try this.
If a cyclist were to do the following two experiments, what would the results be:
Test A - Remove 10 grams from the perimeter of the tire and compare that to removing 10 grams from the seat.
Test B - Remove 10 grams from the wheel HUB and compare that to removing 10 grams from the seat.
What do you think?
The analogy applies this way for our cars:
Remove weight from the perimeter of the flywheel vs same weight removed from the spare tire: Noticeable difference! (removing from flywheel made a significant difference to rotational inertia)
Remove weight from the driveshaft (or the engine pulley) vs same weight removed from the spare tire: NO Noticeable difference!
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What???!!!???
removing 15lbs from drive shaft
vs
removing 15lbs from spare tire
Obviously removing 15lbs of rotational mass in the drive train will net a better performance increase, because either way, you are reducing 15lbs, but one option reduces rotational mass and helps put more power to the ground.
I'll go for the drive shaft option every single day. I think you need to go back to school and learn some general laws of physics.