kgt wrote:So Cervelo's claim is scientificaly proved BS. Good.
yes and no... I'm not an aero expert, but I do a fair bit of TT racing, so I pay attention to the aero tests and from what I gather, anything out front, in the wind, in clean air, has a pretty dramatic effect, while stuff toward the back of the bike doesn't seem to be as important because the air is already seeing a lot of turbulence. Here's how I analyze their claim.... let's assume a standard baseline bike, a general, all-around climbing bike, maybe an R5 with a standard round bar. Then, Cervelo designs the S5 with their handlebar/stem combo and that set up improves the aero over the baseline by 3%, putting the Garmin on stem (because an out front doesn't quite work) doesn't negate that 3%, maybe it only knocks it down to 1.5%. So the bar stem combo still puts you ahead in the aero game even if you do have to mount the Garmin on stem.
mortirolo wrote:Specialized used 17 degree stem in test, I think.
Yes, the bike being used is Cam Piper's personal bike and it appears as if he's using a -17* Zipp Service Course SL. Specialized has stated in numerous materials and aero reports that a -17* stem is the most aero because it puts the entire length of the stem behind the faceplate, shielding it from the wind.... its because of this, that they came up with the rider handlebars for the Venge Vias, allowing for riders to keep the same fitment with a -17* as they would with maybe a -12* or -6* stem and standard bars.