Cracked seat post
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  1. #1
    hfc
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    Cracked seat post

    First time for everything I guess. I noticed this today while washing my cross bike after a muddy gravel ride this AM. Otherwise I haven't noticed any problems. I have had what I assumed was a bottom bracket creak on steep climbs recently, considered seat post or saddle creak, but it persisted when I climb out of the saddle.

    Here's a pic:

    If I had to guess when is happened it was ride before today's when I went down a gravel road descent that was more appropriate for a mtb. I don't remember any huge bumps but the bike and I got rattled around quite a bit.

    Anyway, I'm curious if opinion is normal failure or not. It is on a cross bike, but I don't ride it that much anymore, probably less than 500 miles in the last 2-3 years and out of my 9 bikes I would have picked this seat post as the highest quality. Also would anyone drill out the bottom of the crack and keep riding it?
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  2. #2
    Adorable Furry Hombre
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    That post should have a 3 year warranty on it. Thompson AFAIK is a pretty stand up company.

  3. #3
    hfc
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    Quote Originally Posted by Marc View Post
    That post should have a 3 year warranty on it. Thompson AFAIK is a pretty stand up company.
    While I mentioned mileage over the past 2-3 years, alas, the bike and post are much older than that.

  4. #4
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    Quote Originally Posted by hfc View Post
    Also would anyone drill out the bottom of the crack and keep riding it?
    I would never do that.
    Aluminum seatposts are relatively cheap. Get a new one.

  5. #5
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    Short of driving the roof racked bike into the garage and stuff like that there's no such thing as a 'normal' seatpost failure.

    No, I wouldn't drill it keep using it.

  6. #6
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    Quote Originally Posted by bvber View Post
    I would never do that.
    Aluminum seatposts are relatively cheap. Get a new one.
    +1 on this. Just get a new one OP, it's not worth the risk.

  7. #7
    hfc
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    Thanks all. Already bought a new one, just curious about the drilling. I would think that it wouldn't fail spectacularly like a fork steerer or stem. Probably would just continue to split and then the post would slide down into the seat tube. Then again maybe the top would blow off and fling off saddle and rider.

  8. #8
    Big is relative
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    Did you buy another Elite? I'd be wary of that model on a gravel/cross bike. Is saving weight a factor on your cross bike? The standard Thomson is really beefy and relatively light.
    Retired sailor

  9. #9
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    Quote Originally Posted by bigbill View Post
    Did you buy another Elite? I'd be wary of that model on a gravel/cross bike. Is saving weight a factor on your cross bike? The standard Thomson is really beefy and relatively light.
    I'm pretty sure the Elite is the standard Thompson post and the weight weenie one is called Masterpiece.

  10. #10
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    Google "Thomson Seatpost Crack" or "Failure".

    While it's not epidemic, it seems to have a past. The only reason I went the Google route is I seemed to recall reading on the forums a while ago about Thomson seatpost failure.

    Cozybeehive has an interesting thread on the subject.

  11. #11
    hfc
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    @BigBill - The Elite is the standard, and the Master is the lighter one with thinned walls. I got an Oval Concepts post, primarily to get some setback, as the saddle was all the way back on the Thomson (maybe a factor in the crack?).

    @Peter, thanks for that link, interesting read.

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