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  1. #1
    Senior Member salty road's Avatar
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    Seat post bulge in seat tube.

    Recently I read on sheldon brown's page that if a seat tube is improperly installed or too big that there would be a visible bulge at the top of the seat tube where the seat post penetrates the seat tube. Shortly After reading this I checked my bike and found a very slight warp (like sheldon the one was talking about) on the surface. This warp exists with the bikes stock seatpost. When purchasing my new shimano ultrega I made sure that it was the same size obv, but now I am feeling slightly reluctant to install my new saddle and seat post because I'm scared of the wear that it might cause to the frame. Is it possible that a manufacturer was stupid enough to shove a part to large into their own tubing? Is this a mistake on sheldons part? I feel a bit stupid posting this since I would consider my bike a beater, but it's just hard finding 64 cm frames, shes my behbey!

  2. #2
    partly metal, partly real sp00ki's Avatar
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    Aug 2005
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    pics.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  3. #3
    Senior Member
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    That sort of thing can also be caused by having your seat post over extended.

    By and large, if it has been compromised, you can probably get away with running a seatpost that is long enough to engage the tube for a few inches below the damage.

    -Rob.

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