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buckled wheel or not

  • 02-12-2014 3:36pm
    #1
    tom_tarbucket
    Banned (with Prison Access) Posts: 2,083 ✭✭✭


    I don't know if I have a buckle in my wheel rim or not.

    The rim does not rub off the brakes or does not look like it has an obvious buckle from the back.

    What I can say is that when I cycle it, it does not feel smooth, when I cycle slowly I can feel a slight bounce up and down (north to south) as the wheel turns....so I cycle on a dead falt surface and yet I get a bounce up and down.........like as if the axle was acting up and not truly straight, if you know what I mean

    I think ive made a b@lls of explaining that :)

    does this sound like a buckle ? or is is something else


Comments

  • #2
    crosstownk
    Registered Users, Registered Users 2 Posts: 12,863 ✭✭✭✭crosstownk


    You might have a hop - the rim is not circular.

    Spin the wheel and watch the rim closely where it passes the brake shoe. Look out for up and down or side to side motion. Add some tension to the brake cable to bring the shoes nearer the rim while you look - if it helps.

    You may also have a bulge or some other deform in the tyre so take a close look at it too.

    Its best to have the bike in a stand or upside down (I know that's against the rules ;) )
    Untitled Image




  • #3
    tom_tarbucket
    Banned (with Prison Access) Posts: 2,083 ✭✭✭tom_tarbucket


    crosstownk wrote: »
    You might have a hop - the rim is not circular.

    Spin the wheel and watch the rim closely where it passes the brake shoe. Look out for up and down or side to side motion. Add some tension to the brake cable to bring the shoes nearer the rim while you look - if it helps.

    You may also have a bulge or some other deform in the tyre so take a close look at it too.

    Its best to have the bike in a stand or upside down (I know that's against the rules ;) )


    Thanks for that.

    So a buckle seems to be when you look at rim from behind and its not straight.


    Whereas the thing I might have, the hop, is kinda looking at the wheel from the side and its not a perfect circle.

    Is fixing a hop or a bulge even possible in a LBS ?
    If so, roughly how much would it cost ?

    I know to fix a buckle is roughly between 10 and 15 euro. but don't even know if fixing a hop/bulge is possible and the cost associate


  • #4
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    Fixing a buckle or a hop in a wheel is the same process ('truing' the wheel). I would think it unlikely that a wheel would acquire a hop without also developing a buckle so I would suspect a bulge in the tyre.

    A bulge in the tyre is fixed by replacing the tyre before it blows out.


  • #5
    martyc5674
    Registered Users, Registered Users 2 Posts: 2,521 ✭✭✭martyc5674


    Your tyre may well just need re seating on the rim.
    It may be slightly proud of the rim at one point.
    Again spin the wheel .. This time keeping an eye on the above, there's usually a line on the sidewall of the tyre you can eye up respective if the rim.
    If it's the case let air out and try square it up.. Pump softly recheck before bringing it up to pressure
    Marty.


  • #6
    WillyFXP
    Closed Accounts Posts: 833 ✭✭✭WillyFXP


    martyc5674 wrote: »
    Your tyre may well just need re seating on the rim.
    It may be slightly proud of the rim at one point.
    Again spin the wheel .. This time keeping an eye on the above, there's usually a line on the sidewall of the tyre you can eye up respective if the rim.
    If it's the case let air out and try square it up.. Pump softly recheck before bringing it up to pressure
    Marty.

    And also make sure the valve is pushed inside the tyre rim....


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  • #7
    tom_tarbucket
    Banned (with Prison Access) Posts: 2,083 ✭✭✭tom_tarbucket


    WillyFXP wrote: »
    And also make sure the valve is pushed inside the tyre rim....

    how do you mean ?

    the value normally protrudes out of the rim so as to allow pumping etc


    pardon my stupidity if I'm missing something.


  • #8
    Cee-Jay-Cee
    Registered Users, Registered Users 2 Posts: 12,235 ✭✭✭✭Cee-Jay-Cee


    If the wheel has a high spot then it can be trued by tensioning/loosening the spokes on the opposite side to where the high spot/hop is. If it's very bad no amount of adjusting of spokes will remove it.


  • #9
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    tom_tarbucket wrote: »
    how do you mean ?

    the value normally protrudes out of the rim so as to allow pumping etc


    pardon my stupidity if I'm missing something.

    See the image below (Click image for original thread).
    152023987.KM5LA0OD.valve.jpg


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