Thread: Faster vs. Slower
View Single Post
Old 10-26-16 | 08:51 AM
  #22  
rm -rf's Avatar
rm -rf
don't try this at home.
20 Anniversary
 
Joined: Jan 2006
Posts: 6,220
Likes: 704
From: N. KY
Wind resistance and rolling resistance (tires and drivetrain). Here's an example chart.

At 20 kph (12 mph), rolling and wind are each about half.
At 30 kph (19 mph), or 40 kph (25 mph) wind resistance goes way up compared to rolling resistance.

From the chart,
A 20 km ride at 20 kph is around 90 watts for an hour (add the two lines together.)
A 20 km ride at 40 kph is around 340 watts for a half hour.

Last edited by rm -rf; 10-26-16 at 08:57 AM.
rm -rf is offline  
Reply
0