NNC Wheel Experts, spin on in her(e)
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  1. #1
    All I wanted was a Pepsi!
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    NNC Wheel Experts, spin on in her(e)

    Last week I took an 32-hole Open Pro w/ Powertap hub into the LBS to get rid of a little hop. It had been slightly out of true for at least 12K miles, so I figured it was time.

    The shop monkey got rid of the little hop, but also said the dishing was off, so apparently he fixed that, too. I never noticed any problem with the dishing, and it sat perfectly in the frame. He also noted that some of the nipples were frozen, so he dropped some triflow in there and broke them loose.

    Irregardlessly, now I cannot keep my brakes from rubbing the rim whenever I'm out of the saddle for even the littlest reason, and the wheel visibly flexes under movement by hand, even with the QR nice and tight.

    I took the wheel back yesterday and he went over it again and gave all the spokes another half turn. Today the rubbing continued, though not as bad as before; I only had to open the brake QR halfway to get rid of the rub.

    So should I just take the whole bike down there and have him look it over again? It now looks like the wheel sits slightly off center (after the re-dishing) but that's just eyeballing it. I just wonder why after all those miles it would suddenly start flexing and rubbing.
    "If you have the guts to be yourself, other people'll pay your price." - Rabbit Angstrom

  2. #2
    waterproof*
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    Is he using a tensionometer on the spokes, or just hand-pinging them?
    * not actually a Rock Star

  3. #3
    waterproof*
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    Irregardlessly, yes take 'em back.
    * not actually a Rock Star

  4. #4
    All I wanted was a Pepsi!
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    Quote Originally Posted by Creakyknees View Post
    Is he using a tensionometer on the spokes, or just hand-pinging them?
    He used a tensionometer and noted they were all within spec.

    Today when I first got out of the saddle they didn't rub for a few pedal turns, then I heard a couple soft pings and the rub returned.
    "If you have the guts to be yourself, other people'll pay your price." - Rabbit Angstrom

  5. #5
    Frog Whisperer
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    Quote Originally Posted by Creakyknees View Post
    Irregardlessly, yes take 'em back.
    regardless, take it back.....
    Of course I'm sure...that doesn't mean I'm right.....

    "There's no sense being stupid unless you show it."

    "that was like trying to teach a goldfish how to play basketball over the phone."

  6. #6
    RoadBikeReview Member
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    Any effect on shifting?

    Anyway, this "fix" is going to be worse than that little hop ever was!

  7. #7
    All I wanted was a Pepsi!
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    Quote Originally Posted by Wolfman View Post
    Any effect on shifting?

    Anyway, this "fix" is going to be worse than that little hop ever was!
    Nope, shifting works great.

    And yep, wished I woulda just left well enough alone.
    "If you have the guts to be yourself, other people'll pay your price." - Rabbit Angstrom

  8. #8
    RoadBikeReview Member
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    Huh. Well, take 'em back.

    This part, especially, worries me: "...wheel visibly flexes under movement by hand". That's just not gonna work, but you already knew that.

    Best of luck with that out there in the hinterlands!

  9. #9
    Jerkhard Sirdribbledick
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    Maybe he compromised the spokes when he freed them. Does it work like that?

    Better replace the Subaru just to be sure.
    "He groaned when we hung the rope over the tree but was relieved to see the white pinata."
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  10. #10
    All I wanted was a Pepsi!
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    Quote Originally Posted by DrRoebuck View Post
    Maybe he compromised the spokes when he freed them. Does it work like that?
    That's what I'm thinking, but I'm not a self-aggrandizing wheel expert.

    Quote Originally Posted by DrRoebuck View Post
    Better replace the Subaru just to be sure.
    Rofl. Jerk.
    "If you have the guts to be yourself, other people'll pay your price." - Rabbit Angstrom

  11. #11
    RoadBikeReview Member
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    Wheels really aren't that hard, especially with the newer rims. The wheel may have been built with Spoke Prep or similar (I hate that crap) which can make the nipples seem frozen. Also, do you see any cracking around the eyelets on the rim? Anyway, I'd take it to another shop--not sure the guy knows what he's doing. Or better yet, get a six pack of beer, the Jobst Brandt book on wheels, and a cheap truing stand and have at it yourself.

  12. #12
    Great White North
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    I'm guessing that he missed a few frozen nipples and wound up some spokes, the popping you're hearing might be the spokes unwinding. Also, the dishing on the wheel may be perfect on the dishing gauge, but off center due to the frame. If the wheel was built "in" this frame, it might have been built with any frame offset inherent.

    Also, with 12k miles on a wheel, might be time for a new rim/spokes/nipples. I wore out a set of open pros on my old merckx, just too many miles to keep spokes from breaking and generally causing trouble.

    Plum
    This post is in 3B, three beers and it looks good, eh!

  13. #13
    Failboat Captian
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    Making sure the QR is nice and tight has no effect if the axle nuts are set a bit too loose. You might want to see if you can tighten them without creating any binding or resistance. It might not be the issue, but it's worth a quick check. It could have been slightly loose to begin with, then, during the process of working on it, one of the nuts turned open a little bit. It doesn't take much.
    "I'm tired of people not treating me like the gift that I am."
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    Quote Originally Posted by ToF View Post
    What type of tang does it have?
    Quote Originally Posted by bigrider View Post
    The ones I made had a poo tang.

  14. #14
    RoadBikeReview Member
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    Check your hub bearings to see if there's any play that may be causing your wheel rub. With the wheel clamped in the dropouts, see if you can grasp the wheel by the rim and wiggle it laterally.

    After the wheel was trued and dished, did it appear to be off-center when mounted in the frame? Eyeball the tire between the chainstays and seatstays; that should give you a clue. If so, either your frame is off or the wheel was not dished correctly.

    I'd bring the entire bike back to the original shop only to explain to the manager what has happened, in the hopes that they'll fix it THIS TIME- for free, of course.

    Only after that, if you're still not satisfied, would I try another shop.

    Tensionmeters are hardly necessary to build a quality wheel and sometimes relying on the numbers alone can result in a poorly built wheel. You still have to use your wheel building experience, which is worth more than the tensionmeter.

  15. #15
    Captain Obvious
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    i'm guessing the spokes were prepped and didn't need triflow. tend to think he didn't tension them correctly. are you seeing the wheel true in the frame, but just flexes while riding?
    And it just hurts in the very best way possible without a high priced dominatrix.---Ronsonic

    I'm pretty confident that I've pissed off several dozen random strangers on the internet tonight.---Creakyknees

    disclaimer---I make sh!t up as I go along.

  16. #16
    waterproof*
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    also, make sure your saddle is level.
    * not actually a Rock Star

  17. #17
    Captain Obvious
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    Quote Originally Posted by Creakyknees View Post
    also, make sure your saddle is level.
    and not too high
    And it just hurts in the very best way possible without a high priced dominatrix.---Ronsonic

    I'm pretty confident that I've pissed off several dozen random strangers on the internet tonight.---Creakyknees

    disclaimer---I make sh!t up as I go along.

  18. #18
    Cheese is my copilot
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    Try it with a different wheel. And maybe look for a cracked frame.
    Life is better in the big ring.

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  19. #19
    Sooper Dooper Moderator!
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    I like the pinging sound.

  20. #20
    hfc
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    Maybe it's your frame that's crooked.
    Last edited by hfc; 07-21-2012 at 04:53 PM.

  21. #21
    Banned forever.....or not
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    Sounds like a crappy wheel build.
    .
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    If your opinion differs from mine, ..........Too bad.
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  22. #22
    RoadBikeReview Member
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    I don't understand why he would've assumed the dish was off, unless he's using the Park pro stand and didn't check it with the centering gauge first.

    My hypothesis is he loosened the spokes on the drive side to correct the dish issue and destroyed the tension needed to keep the wheel together.
    I have a perpetual case of bike parts blue-balls - PlatyPius

  23. #23
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    Quote Originally Posted by MR_GRUMPY View Post
    Sounds like a crappy wheel build.
    .
    .
    .
    ...shoulda got Chinese carbon instead...
    * not actually a Rock Star

  24. #24
    All I wanted was a Pepsi!
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    Quote Originally Posted by MR_GRUMPY View Post
    Sounds like a crappy wheel build.
    .
    .
    .
    Yeah, it was working great until I took it in to get "fixed."
    "If you have the guts to be yourself, other people'll pay your price." - Rabbit Angstrom

  25. #25
    RoadBikeReview Member
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    Probaly new wheel time. 12000-15000 miles is all I ever get out of a rear wheel. Then broken spokes, wheel won't stay true, etc.

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