Originally Posted by badkarma
Sorry if I wasn't clear.
In experiment 2, I just added 0.5 kg to the bike and kept the wheels the same as experiment 1.
In experiment 3, I kept the bike the same weight as experiment 1 (7 kg), and then added 0.25 kg to each wheel.
Does this make more sense?
Then you are confirming that saving .5kg in wheel weight is equivalent to saving 1kg in bike weight. The difference is pretty much 2x that of the 2nd experiment.