Minoura Mag Trainers

Discussion in 'Australia and New Zealand' started by Chris, Jun 10, 2003.

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  1. Chris

    Chris Guest

    Has any one had any problems with these trainers?

    My HyperRim has decided to go south for the winter on me.

    I jumped on last night psyching myself up for a 90 minute session working up through the gears to
    warm up. When I got to 3rd gear rear cog on my MTB I picked up the pace a little and all of a sudden
    I lost all resistance and the unit started making a rattling sound like a bearing rolling around in
    a tin cup. So I stopped, got off the bike, kneeled down next to the unit and started turning the
    pedals by hand hoping to get a better idea of where the noise was coming from. It turns out that the
    problem only arises at mid-high revs.

    So off with the remote cover. All looks as it should. The shaft is not sloppy at all but the
    aluminium rotor between the 2 magnets is loose. When I say loose I mean that I can hold the rotor
    with 1 hand and turn the pulley/belt and rotate the shaft inside the rotor.

    My question is should this be possible or should the aluminium rotor/s be bolted tightly to the
    shaft with no slippage? I'm hessitant to tighten the nut at this stage because the washers clamping
    the rotors together look to be made of a similar material to brake pads. I'm thinking that they may
    act as a clutch of sorts which would mean that the nut needs to be torqued to a particular setting.
    However the nut isn't a locking type and it's possible that it has come a little loose which would
    explain the slippage.

    While I am at it, does anyone know where I can find instructions on how to remove the remote? I
    leave it in its hardest setting and use the gears on the bike to vary the resistance.


  2. Hippy

    Hippy Guest

    "Chris" <[email protected]> wrote in message news:[email protected]...
    > Has any one had any problems with these trainers?

    I tore the hub away from the rubber, rim-contacting wheel on a new one - got a replacement unit from
    the store. No problems like you describe though.

    Reminds me.. I just completed a similar destruction to my commuter's rear wheel.. jumping off from
    the lights, it went BANG! and countless spokes were no longer connecting the rim to the hub. Riding
    a little bit further, I then blew the side out of the tyre! :-(

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