Advertise on Bikeforums.net



User Tag List

Results 1 to 4 of 4

Thread: Watts

  1. #1
    Newbie
    Join Date
    Jun 2005
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Watts

    I am trying to calculate the amount of watts I am putting out. Do any of you know a formula that it can use with my weight, speed, wind speed that would tell me how many watts I am using.

  2. #2
    Videre non videri
    Join Date
    Sep 2004
    Location
    Gothenburg, Sweden
    My Bikes
    1 road bike (simple, light), 1 TT bike (could be more aero, could be lighter), 1 all-weather commuter and winter bike, 1 Monark 828E ergometer indoor bike
    Posts
    3,204
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes, but it's not that simple to do just like that.

    To be able to get a decent estimate, you'd need to provide:
    body size (seen from the front)
    weight
    bike's weight
    tyre size and tread
    road condition
    terrain profile
    wind speed and heading relative your direction of travel


    Even then, I'd say the margin of error is probably 30% or so...

  3. #3
    Guest
    Guest
    Just get a professional measurement done by a sports facility or kinesiology lab at a university or a performance testing facility. Then it'll be accurate!

    Koffee

  4. #4
    sch
    sch is offline
    Senior Member
    Join Date
    May 2003
    Location
    Birmingham. AL
    Posts
    2,610
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    www.analyticcycling.com has a power calculator that can give you a ball park figure
    for a road bike. If you can find a shop with a computrainer set up you can see what you can do on a stationary bike. Doesn't really help a lot but it is interesting. On the Giro recently a couple of cyclists had power meters on their bikes with remote readouts that were occasionally displayed on the screen and a few years ago on the HP ladies tour in Idaho, one of the ladies had the same and was running 200 to 400watts (400 were chases up short hills to reestablish contact with the peloton).
    Steve

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •