AJS914 wrote:November's calculations based on their wind tunnel data is that you'll be saving a bike length over 25Km @ 25mph. I don't think that is enough of an advantage that you can feel. I have a friend who paid big bucks for Zipp 303s a few years ago. He swore they were significantly faster, like 1-3 mph faster. I'm sure he believed it but it was probably because he parted with so many thousand dollars to buy those wheels.
November's blog also mentions that there could easily be a 20 watt difference between some race wheels with high end tires and one's training tires with lower rolling resistance tires. Their point is that the tires could easily make a larger difference than the rims.
Indeed, anyone will swear that new wheels are significantly faster. In this case, it's your friends who dropped some coin on Zipp 303. What is he going to say? "I just dropped $2000 on these and can't tell the difference?!
I'm reposting this for those of you that haven't seen this.
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There's a delta of ~ 3 watts of drag at 10 degrees of yaw angle between Zipp 303 and Al33. "10g of drag roughly equals 1 watt, and 1 watt roughly equals 3 seconds in the mythical 40k. Not good enough for real science, but good enough to become a hyper-aware wheel consumer." Do you really need $2000 Zipp 303 wheels when Al33 would do?
We are talking about ~0.3 watts (at 10 degrees of yaw angle) and ~0.1 watt (at 10 degrees of yaw angle). In 40k, this roughly translates to ~1.5 seconds. Am I missing something here?
Source
http://www.novemberbicycles.com/blog/20 ... lloys.htmlFLO claims that 80 percent of the time cyclists experience between zero and 10 degrees of yaw. Source
http://flocycling.blogspot.com/2016/03/ ... tep-2.html
Racing is a three-dimensional high-speed chess game, involving hundreds of pieces on the board.
CBA = Chronic Bike Addiction
OCD = Obsessive Cycling Disorder