Battery Powered Turbo Trainers?

mattybeck
mattybeck Posts: 135
edited January 2011 in Road buying advice
Hi,

Are there turbo trainers available that don’t need to be plugged into the mains to give you wattage, speed etc. Ones that run on batteries, an internal dynamo etc?

Thanks

Matthew

Comments

  • sungod
    sungod Posts: 16,520
    if you get a 'dumb' trainer, you can use a standard cycle computer to give you cadence, heart rate, equivalent speed etc.

    for power you'd need to have a powermeter, or know the power curve for the turbo so that you can convert equivalent speed to power

    i.e. for the kurt kinetic road machine the power curve is given by...

    p = (5.244820) * s + (0.01968) * s^3

    p power
    s speed (mph)

    ...then you can make a table of speed vs. power

    if you get a kurt turbo, they also do a cycle computer that calculates power from this curve, as well as heart/speed/cadence etc., same computer can also be used on the road (no valid power reading then of course)

    http://www.kurtkinetic.com/index.php
    my bike - faster than god's and twice as shiny
  • willbevan
    willbevan Posts: 1,241
    there is the Bushido from Tacx that does not need to be plugged in. It powers itself of your pedalling. the remote heat unit is wireless so I presume that has batteries though.

    like most tacx units (I have an iMagic, also used a borrowed fortius and a flow) the wattage does not match a Power meter such as a power tap. Repearable though if you make sure the tyre pressure is always the same, same amount of turns when engaging the tyre etc...

    The bushido isnt cheap though
    Road - BTwin Sport 2 16s
    MTB - Trek Fuel 80
    TT - Echelon

    http://www.rossonwye.cyclists.co.uk/