Jump to content

Wheel efficiency (pure, no air drag)


Recommended Posts

I've been curious about wheel energy efficiency. I've asked myself - what speed should I maintain to get best mileage on a single charge? I think I'm not the only one who would like to get that answer ?

I've made a simple experiment to determine wheel energy efficiency,. To be exact - I've tried to determine how many watts per hour are consumed by the wheel to ride a one kilometer, but excluding air drag. Why? Because I was curious to determine wheel energetic characteristics. Air drag is easy to determine by simple physics and matematics, so knowing your wheel you can calculate the most efficient speed that include drag.

Ok, here are some details about experiment:

  1. Wheel condition - Kingsong KS-16C with 1.25 firmware, fully charged
  2. Treadmill condition - no incline
  3. Rider weight - 80 kg
  4. Ambient temperature - 25 °C
  5. Measurements acquisition - using WheelLog, speed and power values averaged over about 5 seconds at each treadmill speed.

My treadmill top speed was 18 km/h, speed returned that speed as about 19,26 km/h. I cannot determine if the difference is on the wheel or the treadmill side, but I think it doesn't matter. Here are the raw data. I hope someone will determine a most energy efficient speed including air drag :)




  • Upvote 1
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


  • Create New...