Originally Posted by
merlinextraligh
HED has a wind calculator that gives effective wind based upon wind direction, and rider and wind speed that's pretty cool.
http://s321476941.online.de/hedgerma...calculator.asp
Bad news is that most winds, other than a narrow angle of tail winds, end up being effective headwinds for typical riding speeds.
We tend to exaggerate that. I think somewhere about 105° (with 90° being a side wind and 0 being directly in front), every wind at that angle or greater helps the rider. So that's 150 degrees of the circle that's effective tailwinds, regardless of rider and wind speed. Granted it's less than half of it, but it's a pretty good range that's not an effective headwind.