In find that most bikes are at least 1 pound higher than expected. There are so many variables including calibration of the scale, human error, small factors such as PSI in tires, etc.

My trek 2100 (a 1500 gram or 3.3lb) frame with full dura ace, the lightest bontrager parts, race X Lite aero wheels comes in on three measurements at 17.91lb, 18.02lb and 18.07lb - averaging approx 18 lbs - no saddle bag or water bottles - this is a 63cm frameset real weight. I could drop maybe .5 - 1 pound with lighter wheels. A giant TCR XL (approx 63cm) with SL wheels weights in at about 16.8 - 17 pounds - only .4 pounds lighter than my trek (assuming same wheels). The reality is there are very few 16 or less pound bikes that cost less than about 5000 dollars. BTW my SS giant weights in at 17.3 pounds avg - that is real weight.

I have seen so many bikes weighted in that were said to be "15 pound" bikes - yet in reality there are very few that are really "15" pounds - usually about 16 - 17 pounds in reality.

Add 2 pounds in seat bag and pump, 2 pounds min in water and your 17 pound bike is not 21 pounds - hmmm...

In a race with optimally fit riders 1/2 pound really makes a difference - in the real world optimal gearing with a realitivly light bike (under 20 pounds lets say) a pound or so makes little difference. Now let me takes Jasons (Jchen) experience with the R3 vs his older bike - (15 - 16 pounds lets say vs 18 - 19 pounds) - he his faster. I can claim the same exact thing - I am a few seconds laster on a lighter bike - what does that mean? If I am not in a race - very little - you get stronger on a heavier bike anyway - try riding a MTB then going to a roadie!

It is all about the rider!

Mandy