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  1. #1
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    Are welded seatposts a bad idea ?

    I'm thinking about a titanium seatpost and am wondering if this particular type is more prone to failure than typical machined posts.

    Here's a link --

    J L Ultra Light Titanium Seatpost 27 2mm 31 6mm Fit Road MTB Bike 255g | eBay
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  2. #2
    Randomhead
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    there is nothing wrong with a welded seatpost. That is totally indpendent of the real question, which is if that seatpost will break. I don't know why a framebuilder would know that answer better than a bike mechanic.

  3. #3
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    I guess my hesitation is trusting a chi-ti weld right below my 6'4", 215 lb body. I ride with some finesse but I'm not exactly a lightweight rider.

    Maybe I'm not being fair about Chinese titanium. It might be that their welds are every bit as quality as most more well known titanium manufacturers but I really do not know.

    Seems like the some of the builders here might be able to provide some insight. When titanium parts fail, is it generally at weld points ?

  4. #4
    Anchorage, AK
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    Re: Are welded seatposts a bad idea ?

    I am skeptical of that type of clamp. They don't work well at all on the carbon version of that seat post.

    --Lars
    --Peace

  5. #5
    Nouveau Retrogrouch SuperModerator
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    Quote Originally Posted by phoenixbikes View Post
    I guess my hesitation is trusting a chi-ti weld right below my 6'4", 215 lb body. I ride with some finesse but I'm not exactly a lightweight rider.

    Maybe I'm not being fair about Chinese titanium. It might be that their welds are every bit as quality as most more well known titanium manufacturers but I really do not know.

    Seems like the some of the builders here might be able to provide some insight. When titanium parts fail, is it generally at weld points ?
    Some of these Chinese Ti welders are the "well known" brands.

    I also dislike this type of seat clamp design, regardless of the post material or who makes it.

    I have also seen ti posts bend under riders lighter than you.
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  6. #6
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    I have a couple ti posts already that seem fairly durable. One is a Dean (27.0x425) and the other is a Ti Cycles post (27.2x400).

    I'm curious who made the titanium seatposts that you have seen fail.

    Also, what specifically do you dislike about that clamp style ?
    Do you find it harder to set the seat angle exactly as you want it ?

  7. #7
    Anchorage, AK
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    Re: Are welded seatposts a bad idea ?

    The clamp is very slip prone on the two carbon posts I have with that style clamp.

    --Lars
    --Peace

  8. #8
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    Those clamps have their issues. With your height/weight I wouldn't be too worried bout the post failing but riders 60lbs lighter than you have had issues with that clamp style. The design relies on a single bolt, there is minimal surface area clamping the rails onto the post, and the way the two "wedge" style inner parts fit into the post head open the design to tons of creaking in the future.

  9. #9
    Nouveau Retrogrouch SuperModerator
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    Are welded seatposts a bad idea ?

    Quote Originally Posted by phoenixbikes View Post
    I have a couple ti posts already that seem fairly durable. One is a Dean (27.0x425) and the other is a Ti Cycles post (27.2x400).

    I'm curious who made the titanium seatposts that you have seen fail.

    Also, what specifically do you dislike about that clamp style ?
    Do you find it harder to set the seat angle exactly as you want it ?
    Bent, not fail. Do not remember the brands.

    The side clamps can slip easily (or not move at all), be fussy, noisy, not micro adjust, awkward to mount a saddle. A "solution" that causes problems without solving any.
    mtbtires.com
    The trouble with common sense is it is no longer common

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