PT SL carbon rim - power drops

Discussion in 'Power Training' started by peterwright, Sep 23, 2006.

  1. peterwright

    peterwright New Member

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    I have two PT SL hubs and one is in a Zipp 404 - I have recently had a brand new hub in this wheel due to water ingress but am continuing to see small data drops - 8-10 of around a second in a 2 hour ride.

    My other hub is perfect.

    Is it possible that the stiffness of the carbon rim is causing a vibration to be set up in tuen causing the drop outs ?

    It seems unlikely that the second hub is also faulty but I know my harness and CPU are fine so am looking for another explanation.

    Any ideas appreciated.
     
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  2. Spunout

    Spunout New Member

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    Fresh batteries?

    This is a funny one, especially if you have two different wheels that can be swapped out on the same bike to troubleshoot.
     
  3. Aztec

    Aztec New Member

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    8-10 drops for one second each? That's nothing to worry about, and about what I get (maybe 2-3 per hour) with mine. Usually has to do w/ power lines or something. It's when those drops were more frequent and lengthy that I complained (just got a PTSL back from Saris, and had my PT Pro repaired last year). Thus why I bought an SRM!
     
  4. peterpen

    peterpen New Member

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    Another vote to replace the batteries - I got some weird readings/ behaviour well before the transmission icon began flashing to indicate low hub batteries. A dying CPU battery will also muck things up.
     
  5. peterwright

    peterwright New Member

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    Well my other hub is perfect - no drops, so I am not happy with the drops.

    Batteries - could be but it is a new hub.

    Thanks.
     
  6. Old Junker

    Old Junker New Member

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    my original batteries lasted over 18 months:) , my 1st replacement batteries 3 months:mad: , my 2nd replacment were still going strong 10 months later :)
     
  7. Spunout

    Spunout New Member

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    New Hub...you never know about the batteries.
     
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