Tech Tuesday #37: Wheel Wobble Unveiled!

Tech Tuesday #37: Wheel Wobble Unveiled!


The truth is unveiled in this #TechTuesday. (Follow-up from last week’s Tech Tuesday #36: Pop Quiz Wheel Wobble)

Questions or comments? Leave them below!

Hub illustration by Keithonearth via Wikimedia Commons:
Licensed under CC BY 3.0:

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18 Comments on "Tech Tuesday #37: Wheel Wobble Unveiled!"


  1. Interesting. That assembly must have been very loose at some point for the bearing(s) to fall out of position- I guess someone just tightened it back up. Either that or a bearing service was done incorrectly-allowing balls to fall out of position during reassembly. Another good reason to periodically do a proper full service on your hubs.

    Reply

  2. There"s one more detail that needs to be told: A bent axle does NOT make the wheel wobble (if you don't count the play caused by the cones out of alignment). The axle is stationary on the bike and the hub revolves around it. The wheel would be crooked in the dropouts, there would be strange noises and resistance, but an otherwise undamaged wheel would spin true. If the hub shell wobbles, the problem is always inside the hub.

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  3. im watching to this guy because i have this kind of problem haha, now I subbed!

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  4. I just watched your dishing video, then these two, and, as a new rider (and a home mechanic), I really appreciate the detailed instructions and explanations. My favorite moment so far, however, was the line in this video, "…take stuff apart." So much is said in those few words. Thank you

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  5. Holy Katz… If it lathed a steel axel… what did it do to the inside of the aluminum hub ??? =^0

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  6. i really was thinking for the bent axle. nice video and yes . we always have to check everything before thinking wrong 😉

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  7. This does not really explain a bad machined hub screw mount . Got a bike in that even after re bearing and checking axle the wobble was still visible while freewheeling. The wheel itself was the problem and not the Freewheel cog cassette. The wheel hub screw mount was not machined straight so it was off by 12 degrees which then caused the Freewheel cassette to wobble. You can easily spot this by watching the Wheel spinning and watching the tire rise and drop slowly. That is your sign that the Hub Screw mount of the Wheel is off center thus making any Freewheel cassette Wobble.

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  8. I saw same on the new bike which one standing in the shop. I brought my bike to shop with same problem . And staff told me this is normal.

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  9. The incorrect machined Freewheel Mount always gets everyone even the best bike mechanics. This will create a wobble when freewheeling and will effect shifting gears. The freewheel can be perfectly made but if the Screw mount on the wheel is not centered straight you will always have a wobble.

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  10. some cheaper entry level bikes with freewheels have a natural wobble due to the thread on the end of the hub wasnt cut straight when it was made.

    Reply

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