Cannot get Powertap....now what?

Discussion in 'Power Training' started by phazer, Dec 17, 2006.

  1. phazer

    phazer New Member

    Joined:
    Jun 29, 2005
    Messages:
    35
    Likes Received:
    0
    I ride on Mavic Ksyrium SL wheels and love them...but they cannot take a powertap SL hub...SRM is too expensive, iBike...mmh...still don't trust it, Polar is too much of a hassle setting up from what I heard...so, what's left? Anyone got any ideas what a good power meter would be for me?
     
    Tags:


  2. Roadie_scum

    Roadie_scum New Member

    Joined:
    Nov 14, 2003
    Messages:
    1,288
    Likes Received:
    0
    Get a powertap on a Mavic Open Pro or similar, 32 spoke. Switch to your Ksyriums to race. Easy.

    The Open Pro will be just as stiff and strong and last as long, it will just weigh more and who cares about that for training. If you decide you want race data, you are stuck buying another wheel, but it seems like that's the best answer.
     
  3. sugaken

    sugaken New Member

    Joined:
    Mar 27, 2006
    Messages:
    163
    Likes Received:
    0
    How about an Ergomo Pro? I hear it's in about the same price range as PT SL.
    http://www.ergomo.net/ergomo-pro-_180.html
     
  4. ric_stern/RST

    ric_stern/RST New Member

    Joined:
    Nov 11, 2002
    Messages:
    3,866
    Likes Received:
    1
    How about lacing a PT SL to something like some CXP33 with CX Ray spokes and getting a matching (SL) front wheel. It's not like the Kysriums are a decent race wheel (not particularly aero, or light)

    ric
     
  5. Ironmax

    Ironmax New Member

    Joined:
    Dec 16, 2006
    Messages:
    4
    Likes Received:
    0
    I'll second the vote for an Ergomo Pro. I'm on mine now for 5 weeks and it works great. Bottom bracket measurements so you can swap race and training wheels without a problem.
     
  6. peterwright

    peterwright New Member

    Joined:
    Mar 5, 2003
    Messages:
    533
    Likes Received:
    0
    Agreed - just lose the Ksyriums and get the best rear build you can afford - DT Swiss R1.1 works well as a wheel you can train and race on (this is a must IMO)
     
  7. ric_stern/RST

    ric_stern/RST New Member

    Joined:
    Nov 11, 2002
    Messages:
    3,866
    Likes Received:
    1
    Yup, racing them and getting that data is all important.

    ric
     
  8. Tom Anhalt

    Tom Anhalt New Member

    Joined:
    Dec 9, 2003
    Messages:
    239
    Likes Received:
    0
    IMO you heard wrong.

    That said...here's a good test. If you would typically have a bike shop install your bike computer, don't bother with the Polar. If that's something you'd normally tackle, there's nothing to be afraid of.

    The new CS600 with updated wireless (mostly) power module will be out shortly for a grand total of ~$700.

    Just my 2 pesos.

    Tom
     
  9. Hookyrider

    Hookyrider New Member

    Joined:
    Feb 8, 2005
    Messages:
    287
    Likes Received:
    0
    Ric - you mention my exact setup, probably like a few other folks' as well. I gave up some "fancy wheels" to make way for the PT/SL. Since the PT/SL is so shiny I had some black CXP33's laced up with some ultra shiny double butted Hoshi’s, I picked up a polished sliver Chris King front hub, and have been pleased with the whole set up. Certainly it’s possible to put together a lighter combo, but why bother?



    HR
     
  10. ric_stern/RST

    ric_stern/RST New Member

    Joined:
    Nov 11, 2002
    Messages:
    3,866
    Likes Received:
    1
    all you need is a matching front hub/wheel :). I use the CXP33s as well.

    ric
     
  11. sogood

    sogood New Member

    Joined:
    Aug 24, 2006
    Messages:
    2,148
    Likes Received:
    0
    As flagged on another thread in this forum, iBike may just be the next hot power meter at a fantastic price. Supposedly it's very accurate and is as convenient to switch b/n bikes as a cyclo-computer. And in early next year, they are supposedly bringing out a unit with cadence and HR monitoring included. Hot!
     
  12. ric_stern/RST

    ric_stern/RST New Member

    Joined:
    Nov 11, 2002
    Messages:
    3,866
    Likes Received:
    1
    but isn't there a *major* shortcoming... you can't use it on a trainer... (and some other issues)

    ric
     
  13. sogood

    sogood New Member

    Joined:
    Aug 24, 2006
    Messages:
    2,148
    Likes Received:
    0
    I don't know. Alienator is the source of knowledge on this in the other thread. But hey, for the asking price, it's fantastic even with the shortcoming.
     
  14. jetnjeff

    jetnjeff New Member

    Joined:
    Mar 17, 2006
    Messages:
    188
    Likes Received:
    0
    It is great if you never change your coeficient of drag (frontal Area) by switching form the drops to the tops or draft someone.

    And of course the trainer thing, won't work if you are not moving throught the wind.
     
  15. sogood

    sogood New Member

    Joined:
    Aug 24, 2006
    Messages:
    2,148
    Likes Received:
    0
    I wouldn't be surprised if it's more sophisticated than that. It has a number of sensors including accelerometers/wheel speed/pitch etc and it's amazing what digital processing can do these days. I would wait for the test report.
     
  16. ric_stern/RST

    ric_stern/RST New Member

    Joined:
    Nov 11, 2002
    Messages:
    3,866
    Likes Received:
    1
    It *can't* do either of these things, as i mentioned previously

    ric
     
  17. jmocallaghan

    jmocallaghan New Member

    Joined:
    Dec 27, 2003
    Messages:
    137
    Likes Received:
    0

    The Polar is pretty easy to set up honestly. I can generally do it in about 1/2 an hr, 45 minutes if I want to be suave and sophisticated and hide all the cables. Likewise, Polar is due out a new model coming up this spring which is a refined cyclocomputer and power meter which will give you better 1sec and 5sec views over the current watch. Polar works great when you're swapping wheels.
     
  18. JTE83

    JTE83 Member

    Joined:
    Jan 28, 2004
    Messages:
    1,390
    Likes Received:
    9
    The Polar is not a hassle to install. Well, but you need something to measure the weight of the chain in grams accurately. And then you should glue a neodynium magnet to the right pedal shaft for the cadence magnet. Then mount the speed sensor downwards.

    I'm gonna get the new Polar meter instead of the ergomo pro because the ergomo pro only measures the left leg then doubles it. May have gotton the ergomo if it was $1150 though. At $1600 it's a bit expensive.
     
  19. RapDaddyo

    RapDaddyo Active Member

    Joined:
    May 17, 2005
    Messages:
    5,088
    Likes Received:
    41
    I'm not sure about the accuracy bit. I haven't ridden with one yet, but on a team ride a few days ago a guy with an iBike compared numbers with me on a climb (twice). Conditions should have been perfect for the iBike. The road was a fairly steady climb ~6% the first time we compared numbers and ~8% the second time, wind was light and variable. We were riding side by side so there was no issue with drafting. The rider is a bike shop owner and he had done all of the recommended calibrations, etc. I was riding my PT SL, which is regularly zero torqued. His weight was within 3 lbs of my weight. The first time he asked me I was doing 340W and the iBike said 235W. The second time I was doing ~395W and the iBike said 295W. Granted, this is just two comparisons but it doesn't give me much confidence in the iBike's accuracy. I'm not trashing the iBike, simply reporting a pretty significant discrepancy between what it said and my PT SL. If it had been within a few watts, I would be happy to report that as well. But, it wasn't.
     
  20. sogood

    sogood New Member

    Joined:
    Aug 24, 2006
    Messages:
    2,148
    Likes Received:
    0
    Yes, that is a concern. There seemed to be a range of reports on the accuracy of this product which may well be related to the firmware version. I continue to take the watch and see attitude on it. The big advantage of course is its price and portability, which may also relate to its inaccuracy.
     
Loading...
Loading...