Originally Posted by
AWillZ
My friend contends that a 180 lb rider on a 20 lb bike is the same as a 185 lb rider on a 15 lb bike and I say not even close, 5 lbs of rider weight is far less significant than 5 lbs of bike weight. I also contend that a 16.5 lb bike with 1500 gram wheelset is going to be an advantage over a 15.5 lb bike with 1750 gram wheelset.
Argument: your friend is making an assertion. Your response is suppose to be a rebuttal. All you did was to make another assertion without a rebuttal. That is why this argument will go nowhere.
The rebuttal requires great physics skill. Perhaps neither of you have it and that's why you're here.