Advice on turbo trainer with reasonably accurate power

Discussion in 'Power Training' started by sergen, Jan 2, 2008.

  1. sergen

    sergen New Member

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    For some reason the 'search' function no longer appears to be available so I have been unable to see previous posts on this subject.

    I am looking to purchase an indoor turbo trainer that will provide me with accurate power information while riding indoors. The interval workouts would all be L4/L5 so I wouldn't be using the trainer for any intervals requiring Tom Boonen-esque power. I'd only need up to 350/400W max resistance.

    Sadly a road powermeter is currently beyond budget.

    From the internet research I've done the Kurt Kinetic seems like a recommended purchase. I would be interested to learn from other forum users what their experiences are of indoor turbo trainers with power readings. Are there any recommeded models that you have compared with Powertaps or SRMs?

    Many thanks
     
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  2. wiredued

    wiredued New Member

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    I like the Kurt Kinetic Road Machine if you don't do alot of sprinting and the Spinervals Superfluid 4.5 if you do alot of sprints and don't want any tire slipage. They both have the same leak proof KK fluid resistance unit that is PT calibrated.

    17mph=183.33w
    17.1mph=185.53w
    17.2mph=187.74w
    17.3mph=189.98w
    17.4mph=192.23w
    17.5mph=194.51w
    17.6mph=196.80w
    17.7mph=199.12w
    17.8mph=201.46w
    17.9mph=203.81w
    18mph=206.19w
    18.1mph=208.59w
    18.2mph=211.01w
    18.3mph=213.45w
    18.4mph=215.91w
    18.5mph=218.39w
    18.6mph=220.89w
    18.7mph=223.42w
    18.8mph=225.96w
    18.9mph=228.53w
    19mph=231.12w
    19.1mph=233.73w
    19.2mph=236.36w
    19.3mph=239.02w
    19.4mph=241.70w
    19.5mph=244.40w
    19.6mph=247.12w
    19.7mph=249.86w
    19.8mph=252.63w
    19.9mph=255.42w
    20mph=258.24w
    20.1mph=261.07w
    20.2mph=263.93w
    20.3mph=266.81w
    20.4mph=269.72w
    20.5mph=272.65w
    20.6mph=275.60w
    20.7mph=278.58w
    20.8mph=281.58w
    20.9mph=284.60w
    21mph=287.65w
    21.1mph=290.72w
    21.2mph=293.82w
    21.3mph=296.94w
    21.4mph=300.09w
    21.5mph=303.26w
    21.6mph=306.45w
    21.7mph=309.67w
    21.8mph=312.92w
    21.9mph=316.19w
    22mph=319.48w
    22.1mph=322.80w
    22.2mph=326.15w
    22.3mph=329.52w
    22.4mph=332.92w
    22.5mph=336.34w
    22.6mph=339.79w
    22.7mph=343.26w
    22.8mph=346.76w
    22.9mph=350.29w
    23mph=353.84w
    23.1mph=357.42w
    23.2mph=361.03w
    23.3mph=364.66w
    23.4mph=368.32w
    23.5mph=372.01w
    23.6mph=375.72w
    23.7mph=379.46w
    23.8mph=383.23w
    23.9mph=387.03w
    24mph=390.85w
    24.1mph=394.70w
    24.2mph=398.58w
    24.3mph=402.48w
    24.4mph=406.42w
    24.5mph=410.38w
    24.6mph=414.37w
    24.7mph=418.39w
    24.8mph=422.44w
    24.9mph=426.51w
    25mph=430.62w
    25.1mph=434.75w
    25.2mph=438.91w
    25.3mph=443.10w
    25.4mph=447.32w
    25.5mph=451.57w
    25.6mph=455.85w
    25.7mph=460.16w
    25.8mph=464.49w
    25.9mph=468.86w
    26mph=473.26w
    26.1mph=477.68w
    26.2mph=482.14w
    26.3mph=486.63w
    26.4mph=491.14w
    26.5mph=495.69w
    26.6mph=500.27w
    26.7mph=504.88w
    26.8mph=509.52w
    26.9mph=514.19w
    27mph=518.89w
     
  3. RedRider2009

    RedRider2009 New Member

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    If I remember correctly, my Kurt Kinetic fluid trainer can handle up to 3000 watts. Wouldn't that mean that you are going like 156 miles per hour assuming that 27mph is 519 watts?
     
  4. Piotr

    Piotr New Member

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    No. The relationship between speed and power is not linear.

    180 W = 17 MPH,
    360 W = 23 MPH not 34

    3000W would be around 52 MPH. You'd need over 73000 W (100HP) to go 156 MPH :) (on the KK trainer that is).
     
  5. Ade Merckx

    Ade Merckx New Member

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    I too would love a powermeter at some stage. However the Kurt kinetic has been great so far. It has a great road feel and getting immediate wattage feedback is excellent. According to what I've read its fairly accurate up to 400watt (i'm never gonna reach that FT power so no worries!) but can loose accuracy up to 10% beyond that. Its very easy to set up which is important for a technical dinosaur like myself. I'm really glad I got it especially as I'm now in the 300wattFT club :D
     
  6. Alex Simmons

    Alex Simmons Member

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    <pedantic mode on>

    Suggesting you are measuring power with that level of significant digits is misleading. It (i) assumes the speed-power conversion formula for the KK is accurate all the way through the range, (ii) it is the same for everyone and every KK trainer and bike/wheel/tyre set up, (iii) you are measuring speed accurately and (iv) you don't report an output with more significant digits than your inputs anyway.

    <pedantic mode off> ;)
     
  7. wiredued

    wiredued New Member

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    That's just what the calculator gave me I'm really not that pretentious I use the decimals to round off to the nearest watt if my 20mph coast down is 13.4 seconds which it ussually isn't unless I'm in "pedantic mode".:)

     
  8. Yojimbo_

    Yojimbo_ Well-Known Member

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  9. Mish

    Mish New Member

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    Does this mean if I average 19.0 mph on the road for an hour I have an FTP of 231? I have a Road Machine and the Computer. No on bike power meter and I want to set training levels.
     
  10. Ade Merckx

    Ade Merckx New Member

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    Er if you mean 'the road' (outdoors) no it calculates power only when on the Kurt Kinetic trainer. Just follow the instructions for set up (measure wheel circumference when sat on the bike and input data) and Robert's your father's brother :cool:
     
  11. Mish

    Mish New Member

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    Actually Robert is my father's name and his brother is Joe so Robert is my cousin's father's brother.
    As soon as I clicked submit I realized what a dumb question it was. You were kind not to tell me the same.
     
  12. Ade Merckx

    Ade Merckx New Member

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    Cool, IOW's Bob's ya cousins uncle :D
     
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