Originally Posted by
chinarider
I can't tell you why, but that doesn't sound right. I can tell you its harder to ride 20mph with no wind than 10 mph into a 10mph headwind.
Wind speeds are by convention measured 10m above the ground. The closer you get to the ground the slower the wind gets. So what the weatherman says is a 10mph wind isn't really, at the height of the bike.
Also, spokes do a good bit of air churning no matter what the wind speed.