Originally Posted by
gregf83
It also wasn't due to the bikes. Your position changed and you may have put out more power. More power alone would be unlikely to account for the difference so it has to be primarily based on your position and other aero effects. You mentioned you raced for the first time. Learning what it's like to suffer also helps.
Even the most optimistic marketing types wouldn't make a claim for 2mph improvement.
not saying I agree with a 2mph in 4wks because of equipment, but......... his position on the bike changed because of the new equipment, right? sure he could have got that aero position with a good fit from a reputable shop, but also, the geometry of the newer bikes may have been more optimal for his body type and allowed him to transfer more power. there are a lot of variables that could be attributed to the "equipment", but likely the old equipment was holding him back for many reasons, could have been poor wheels, poor fit, etc. but the newer bike "fixed" that problem so, while I tend to believe that all else being equal (fit and etc) changing bikes won't net a big gain like that, but if those variable are not the same then the new bike was responsible for his improvement even if it was because it was more suited to him.