Wheels Rear wheel shakes up and down (in place)?

Discussion in 'Bicycle Repair' started by Fletch, Aug 25, 2010.

  1. Fletch

    Fletch Member

    I'm new to assembling bikes and I notice that when I hold onto the seat and lift the rear tire off the ground, and I spin the tire hard by pedaling... there is an extreme amount of up and down shaking or vibration of the rear wheel.

    Basically you can feel and see the rear of the bike shaking up and down.

    So I'm wondering now how normal this is or if the wheel may be bent?

    I completely wasn't thinking and put slight weight on the bike while adjusting the seat without yet inflating the tires. Really stupid I know!

    I searched online a bit and some said that ANY bike on a stand is going to shake "like crazy" when pedaled hard? I'd hate to have to take it in and spend money on repair or a new wheel.

    How significant is this in your opinion? It isn't noticeable while riding, so I'm not sure what to do. I'm worried it may come back to bite me later on, and like to take care of it if necessary before I mount the engine.

    Thanks in advance!
     

  2. Lazieboy

    Lazieboy Member

    Issues

    Hi, Is the tire bead (Rubber) evenly around the rim., When holding up does tire itself move out of round (don't trust white wall), or is the rim or both. maby sprocket is not evenly centered on tire hub. If riding it's not noticeable give her the gusto but keep an eye on it.
     
  3. ibdennyak

    ibdennyak Guest

    Like he said. :grin5: Make sure the tire is properly seated on the rim (bead is even all the way around). Other than that, some of the cheaper tires aren't molded perfectly round. I have the same thing on some of my bikes. If it isn't bothersome when riding, I just ignore it.
     
  4. Fletch

    Fletch Member

    Thanks for the replies/tips :grin5:... I'll take a look to see if the bead is seated evenly and hopefully it won't be a problem when riding. It may just be a cheap tire like you said ibdennyak.
     
  5. Lazieboy

    Lazieboy Member

    Cover your lid

    Helmets are a good idea. watch the fenders (L-bracket).
     
  6. Fletch

    Fletch Member

    I don't follow you?
     
  7. ibdennyak

    ibdennyak Guest

    Lazieboy is just giving you some additional safety tips...wearing a helmet is a good thing and the fender mounting tabs like to break off on cruiser fenders. That usually causes the front wheel to lock up, which is a good reason to wear a helmet. :idea:
     
  8. Fletch

    Fletch Member

    I gotcha...I definitely plan on wearing a helmet.
     
  9. Fletch

    Fletch Member

    How do I check if the tire is properly seated? Is it just by eyeballing it? Do I need to deflate it? Thanks.
     
  10. happycheapskate

    happycheapskate Active Member

    Try match marking the tire with a magic marker, and rotating it 180 degrees compared to the valve stem. See if it still is unweighted as badly (also, if you use a reflector, put it at odds to the valve stem or remove it. Reflectors weigh quite a bit sometimes.

    put the wheel with no tire in a stand or dropout and see if it is out of round.

    If not, I wouldn't worry about it unless you feel it while riding.
     
  11. Fletch

    Fletch Member

    Thanks for the reply. I've since figured out it was just a badly molded tire. I checked the rim with no tire, and then tried a different tire with no problem. I still have those tires in case I ever need replacements, but I fitted both my cruisers with the Bell 'comfort' kevlar tires from Walmart. I also wrapped the rim with tons of electrical tape, used thorn resistant tubes, and put in tire liners. I really don't want any flats! ;)
     
  12. Hammond Egger

    Hammond Egger Member

    I've got a rear wheel on my Landmark that is so out of round that it almost bucks you off at anything over about 15 miles an hour. I ordered a wheel truing stand, I probably should have ordered a new wheel instead.
     
  13. Fletch

    Fletch Member

    If you're looking to replace your wheels, I just got these: http://www.motoredbikes.com/showthread.php?p=298978#post298978
     
  14. happycheapskate

    happycheapskate Active Member

    The wheel truing stand will give you hours of enjoyment and a second source of income! (half joking).

    If you are good though, all your bikes will run nicely, and your friends will bring you beer.
     
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