Are you serious? The independent variable was heart rate? If so, the "study" is bunk. I might believe the test IF the independent variable was power, but heart rate is way too variable. Besides, there are so many other factors to consider when testing a product (wind, temperature, etc.) that a "test" with only two trial (n=2) is even more flimsy.

The attack on the "model" developed by analytic cycling is a joke. It's like the attack on the "theory" of evolution.

In three words, Analyticcycling.com is right.

Ciao,
Andrew

EDIT:

Hm.. The article states: "The average heart rate reached during the test with the Stiletto was 159 bpm, while with the Ksyrium the average was 158 bpm. The tests were conducted in a short time period with equal weather and physical conditions, utilizing a consistent cadence and power." But it also states that they ONLY used a heart rate monitor. So do they have h.r. data and power data or just h.r. data? Regardless, subtle shifts in the wind change completely fudge up the data. And my other point that n=2 also shows that this "test" really is invalid.

So my conclusion is: Go to http://www.analyticcycling.com and see for yourself.

Actually, the independent variable was the wheelset in question.
But, whatever, I simply translated the article as a favor to the Forum.
And I do think real world testing is more valid than an Excel model, excuse me.

_________________
"Gimondi è un eroe umano, che viene sconfitto ma che continua la sua corsa fino a tornare a vincere." - Enrico Ruggeri

www.2peak.com

Possibly the best for calculations, they have individually tested different wheels!

Check it out

www.2peak.com

no reply to my last post, ye olde bald one?

Dan,
I'm curious about that thing. Are you referring to the Speed Calculator?
If so, I ran several calcs of the different wheels they list: same hilly ride, same rider power, elevation, distance, rider weight, bike weight, etc. All data the same except wheels. According to that thing, the Alex would perform marginally better than the Ksyrium, the Lightweight even worse; but a "Box rim 32 hole" performs the best of all!
Are you sure this is an accurate calculator? Just wondering how it's set up, and it leads me to believe that theory doesn't necessarily reflect practice....

_________________
"Gimondi è un eroe umano, che viene sconfitto ma che continua la sua corsa fino a tornare a vincere." - Enrico Ruggeri