Originally Posted by
Doge
Depends who you are and what you are doing. Your 19lbs vs 15lbs matters for racers But most competitors ride very similar equipment, so brand X vs brand Y are pretty close. It matters in the riders head too. The head matters a lot. It matters in TTs which are core to so many races and often won in fractions of a second over several thousand seconds.
Does that mean it matters? Just depends on what is important.
Does a 15lb bike give a world class velodrome sprinter and advantage. Probably not. At some point equipment no longer is an advantage as other factors come into play.