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How do they measure rider power output?

Discussion in 'Pro Cycling (Road and Track Racing)' started by Globalti, 19 Jul 2007.

  1. Globalti

    Globalti Legendary Member

    First came across this in the Michael Hutchinson book and have now seen it in relation to the Tour. Is it done by a speed/pedal RPM comparison?
  2. chris42

    chris42 New Member

    Deal, Kent
    There are 3 main methods
    SRM Cranks which have a strain meter (don't know the correct term) in the bottom bracket.

    Power tap.
    Similar to SRM but located in the rear hub

    Which is the least accurate which works on the movement of the chain and the cadence I think.
  3. Squaggles

    Squaggles New Member

    Speaking of SRM has anybody got the live SRM data on the cyclingnews website to work ?
  4. Keith Oates

    Keith Oates Janner

    Penarth, Wales
    I've had no luck with that, is it for real are are they taking the mickey!!!!!!!!!!!!!!!!!!!!!
  5. Keith Oates

    Keith Oates Janner

    Penarth, Wales
    Talking of NO NO's, I can't get any joy with NOS either today. Anybody more lucky than me!!!!!!!!!!!!!!!!!!!!!!!!