Unbelievable watt savings

[kgreene10]

Today’s article in Cycling Weekly has wind tunnel data to indicate that narrow handlebars can save an insane number of watts —

https://www.cyclingweekly.com/produc...-my-handlebars

At 35kph, a 30cm bar saved 17.6w over a 36cm bar (already very narrow) in quite an upright position. Lather gains are to be had for even narrower bars and higher speeds. Then amp this up further given than most of us are on bars wider than the baseline 36cm.

It just seems impossible. If you read the piece (or watch the video), what’s wrong with the test that could render the finding incorrect?