I tried one time, as part of an experiment, to ride a bike with a fixed handle bar. Impossible. So, in any case, our movements made with the handlebar helps us in not falling down. I can feel kinda how, but cannot really put a finger on it. Does anybody know the answer?

  • $\begingroup$ How does your personal inability to perform this act constitute a proof that it's impossible? $\endgroup$
    – CuriousOne
    May 22, 2016 at 9:08
  • 1
    $\begingroup$ Possible duplicate: Why doesn't a bike/bicycle fall if going with a high speed? $\endgroup$
    – lemon
    May 22, 2016 at 9:16
  • $\begingroup$ Is it really impossible at a high speed? Getting started could be tricky, but at speed you can ride hands free. I wonder whether you still need to allow the handle bar to turn $\endgroup$
    – innisfree
    May 22, 2016 at 9:27
  • $\begingroup$ @innifree: Every circus probably has half a dozen people who can take a nap on a unicycle... I think the OP needs to take a closer look at what people can do who are actually not giving up after five minutes. $\endgroup$
    – CuriousOne
    May 22, 2016 at 9:35
  • $\begingroup$ Related: physics.stackexchange.com/q/24/2451 and links therein. $\endgroup$
    – Qmechanic
    May 22, 2016 at 9:47

1 Answer 1


You can't ride it because it's very thin and so is bound to fall over to one side or the other.

A more difficult question is why you can ride a bike in normal circumstances. That has already been discussed on this site but as you would expect the answer is related to the steering mechanism.


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