Cycling Equipment · Public discussion

Cassette wobble

Started by Ace_rimmer1 · · Last activity · 4 posts · 923 views

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Cycling Equipment
Published
8 June 2006
Last activity
8 June 2006
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Ace_rimmer1
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  1. I just bought a set of Mavic XM719's with LX hubs and Cassette, I noticed with the bike upside down resting on the bars and saddle there is quite a vibration (the frame rocks side to side) when I turn the crank fast, I'm sure the rear wheel is true, it is brand new with the cassette but I noticed when turning the crank and then letting the wheel freewheel that the rear cassette wobbles very sligtly as the wheel turns, nothing is loose but it looks like it's off by a fraction (1/8 mm maybe) and just has a very slight wobble when the wheel is turning.

    Is this possible, can the cassette be fitted incorrectly, the movement is absolutlely minimal as I said only by a tiny fraction do you notice the wobble, it doesn't appear that the wheel is wobbling as well but I would think this was not normal.

    Cheers
    Ace

  2. [font=Arial]The weight of the valve stem causes the wheel to wobble a little bit... when I first read you post i thought you said an 1/8 of an inch which would be a problem... I think you should be
    ok with what you got... Make sure the tire bead is properly seated, check the wheel in a truing stand if it was new and you put some miles on it...other than that enjoy your new
    wheel set they're fine...

    I was working on a cheap bike at bicycle works last night that had a free hub... it wobbled an 1/8 of an inch but it was actually caused by the el cheapo parts...[/font]

  3. jamesdemien said:

    [font=Arial]The weight of the valve stem causes the wheel to wobble a little bit... when I first read you post i thought you said an 1/8 of an inch which would be a problem... I think you should be
    ok with what you got... Make sure the tire bead is properly seated, check the wheel in a truing stand if it was new and you put some miles on it...other than that enjoy your new
    wheel set they're fine...

    I was working on a cheap bike at bicycle works last night that had a free hub... it wobbled an 1/8 of an inch but it was actually caused by the el cheapo parts...[/font]


    An 1/8 of and inch I would be worried, the wheels have done no miles yet, I adjusted the brakes so they were just a fraction off the rim and there was no rub so this is what made me think the wheel is true, I would understand a bit of movement if it were while I peddled with the force of the chain but it's while the wheel is freewheeling and the cassette isn't turning it wobbles, I'll get it on the road soon,

    I've been waiting for the tool to tighten the hollowtech II plastic plug on the chainset, couldn't wait any longer so took it to LBS and they over tightend it and the crank don't turn freely anymore, I kept saying shimano says just nip it up but they said don't listen to shimano, the plug acts like a torque adapter and you tighten it until it slips, I said as it's a plastic plug if you tighten it until it slips it's slipping because the thread is being mangled, I got it out of there quick but now I gotta wait till I get the tool to see if they've damaged it.

    I kept hearing a little voice saying, "you've spent £500 on upgrades don't take it to the bike shop", but I couldn't wait, lesson learned. DIY

  4. Last year I suddenly found cassette wabble in the 105 hub in my Felt. I had a bent the axle and freehub mounting bolt. An axle and bearing kit and a new retaining bolt from Shimano fixed it. I asked the LBS, "How did I do this?" They replied, "Probably getting on the bike on the trainer!"

    I now climb on the trainer from the rear, putting my feet on the trainer axles not the pedals as I mount/dismount. All good now. 😄

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