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  1. #1
    Senior Member Dang's Avatar
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    Question about new tires

    When I asked him about the out of round appearence, the kid at Bob's said the $19.99 Specialized 700x28 Crossroads will be just fine once I pump them up on my rim. But after pumping a ton of air in them they both have annoying wobbles. One is so bad it barley rubs on the chain stay. The ride is okay but you would think a pair of $40.00 Specialized tire would be at least almost true. Will they get better as time goes on or should I just return them?
    A bicycle, or bike, is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other.

  2. #2
    Macaws Rock! michaelnel's Avatar
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    Are they seated properly on the rim?

    You can check this by looking for a molded raised line near the edge of the rim but on the tire. Rotate the wheel, and that line should stay equidistant from the edge of the rim.

    If it doesn't, the tire isn't seated properly on the rim.
    ---

    San Francisco, California

  3. #3
    Banned. Mr. Beanz's Avatar
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    You sure your rims aren't out of true? I've seen some tires that wobble, but not enough to touch the chainstay.

    Check the runout of the rim brake surface, compared to the brake pads.

  4. #4
    Curmudgeon Wil Davis's Avatar
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    Sounds like they're not seated on the rims. I have the same problem with the rear-wheel of one of my bikes. It's caused by there being a rough spot on the inside of the rim, which the bead of the tyre has a problem moving up on to - the only way I've been able to cure this is to use a Q-tip to smear some liquid detergent (neat washing-up liquid) on to the bead at the point where it needs some help, and inflate to 125 psi. Works every time!

    Hope this helps!

    - Wil

  5. #5
    totally louche Bekologist's Avatar
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    I've seen thwacked tires that may have been shipped and stored so they develop an out of round, out of true memory in the plies and wire bead.

    Go show "BOB", tell him to make it right because you bought these tires from him and they appear to have been warped prior to your purchasing. Maybe its just a beadseat issue, usually it is.
    "Evidence, anecdote and methodology all support planning for roadway bike traffic."

  6. #6
    Curmudgeon Wil Davis's Avatar
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    Quote Originally Posted by Bekologist
    I've seen thwacked tires that may have been shipped and stored so they develop an out of round, out of true memory in the plies and wire bead.

    Go show "BOB", tell him to make it right because you bought these tires from him and they appear to have been warped prior to your purchasing. Maybe its just a beadseat issue, usually it is.
    I had a similar experience with my LBS. I'd bought a tyre which had been stored/shipped folded in such a way that there was a kink in the bead. I was absolutely sure there was a problem with the tyre, and so took it back to my LBS who were adamant that it was just a rough spot on the inside of the rim and after demonstrating that the tyre was OK, they eventually got it to seat correctly on the rim. I've had that tyre on and off that rim a number of times since, and it always requires the soap treatment.

    - Wil

  7. #7
    Senior Member Retro Grouch's Avatar
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    Sometimes the valve stem base will make a tire out-of-round. If the high spot looks like it's opposite the valve stem, deflate the tire to about 15psi, push the valve stem inward toward the hub, and reinflate the tire.

  8. #8
    Senior Member Dang's Avatar
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    Well after taking into consideration everything you guys said, combinding that with my infinite wisdom & re-inspecting the tire(s)...I decided that the tire's bead was messed up from shipping and so I returned them to Bob's. I then threw down an additional 20 bucks and picked up another set that seem a lot more true then the last set. I can't belive I blew a 60 dollar gift certificate on two bike tires for a old hybrid I paid only 320 bucks for back in '97.
    Thanks guys and Happy New Year!
    A bicycle, or bike, is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other.

  9. #9
    52-week commuter DCCommuter's Avatar
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    Quote Originally Posted by Dang
    I can't belive I blew a 60 dollar gift certificate on two bike tires for a old hybrid I paid only 320 bucks for back in '97.
    That's what we're here for! Advice may be free, but it's not cheap!

  10. #10
    No Rocket Surgeon eubi's Avatar
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    Well, I was going to suggest you be sure the tube wasn't twisted, but you already got to the root of the problem.

    Hey! Why not draw a cartoon about it?

  11. #11
    Senior Member Dang's Avatar
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    Quote Originally Posted by eubi
    Well, I was going to suggest you be sure the tube wasn't twisted, but you already got to the root of the problem.

    Hey! Why not draw a cartoon about it?
    Oh you saw my cartoon did you? You know I didn't even check for replieson that post till just now. Halairious. ( did I spell that right?)
    You can see some more cartoons at:
    http://photobucket.com/albums/c333/JackandTimmy/
    A bicycle, or bike, is a pedal-driven, human-powered vehicle with two wheels attached to a frame, one behind the other.

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