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  1. #1
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    Seatpost clamp size.---WTF--I hate this

    I'm pissed off. If youíve been noticing, Iíve been asking a lot of questions due to my frame change not going as smoothly as I was hoping. Here is my next problem. My new frame is Magnesium and therefore the tubing is thinner than the old Aluminum bike. So naturally the seat post clamp doesnít F-in clamp anything, it just presses against itself to the max and the seat post just moves however it wants. Now, I should mention that the seat tube size on the new frame is the correct one, just the tubing is thinner. Any ideas. And will I be able to find the right size clamp or Iím stuck doing modifications to the current one. Thanks.

  2. #2
    Senior Member sydney's Avatar
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    Quote Originally Posted by mitok
    I'm pissed off. If youíve been noticing, Iíve been asking a lot of questions due to my frame change not going as smoothly as I was hoping. Here is my next problem. My new frame is Magnesium and therefore the tubing is thinner than the old Aluminum bike. So naturally the seat post clamp doesnít F-in clamp anything, it just presses against itself to the max and the seat post just moves however it wants. Now, I should mention that the seat tube size on the new frame is the correct one, just the tubing is thinner. Any ideas. And will I be able to find the right size clamp or Iím stuck doing modifications to the current one. Thanks.
    They do come in different sizes. You measure your seattube and then start looking.

  3. #3
    Senior Member halfspeed's Avatar
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    Quote Originally Posted by mitok
    I'm pissed off. If you've been noticing, I've been asking a lot of questions due to my frame change not going as smoothly as I was hoping. Here is my next problem. My new frame is Magnesium and therefore the tubing is thinner than the old Aluminum bike. So naturally the seat post clamp doesn't F-in clamp anything, it just presses against itself to the max and the seat post just moves however it wants. Now, I should mention that the seat tube size on the new frame is the correct one, just the tubing is thinner. Any ideas. And will I be able to find the right size clamp or I'm stuck doing modifications to the current one. Thanks.
    http://biketoolsetc.com/index.cgi?id...osts&tc=&q=&s=

    If you can't measure and figure out the size you need yourself, your LBS shoudl be able to do it.

  4. #4
    Senior Member royalflash's Avatar
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    you can buy shims if you don`t want to buy a new saddle post

  5. #5
    Senior Member sydney's Avatar
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    Quote Originally Posted by royalflash
    you can buy shims if you don`t want to buy a new saddle post
    It's not the post.It's the right size.

  6. #6
    Senior Member Retro Grouch's Avatar
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    I'm kind of surprised that you say that the front derailleur clamp fits and the seatpost clamp doesn't.

  7. #7
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    Quote Originally Posted by Retro Grouch
    I'm kind of surprised that you say that the front derailleur clamp fits and the seatpost clamp doesn't.
    I haven't completely tested out the front derailleur, maybe it will slip once I start sifting and all but Iím pretty sure there is more slack to play with on the derailleur then the seat post clamp.

  8. #8
    Senior Member sydney's Avatar
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    Quote Originally Posted by mitok
    I haven't completely tested out the front derailleur, maybe it will slip once I start sifting and all but Iím pretty sure there is more slack to play with on the derailleur then the seat post clamp.
    The derailer clamp is the right size or it isn't.

  9. #9
    You need a new bike supcom's Avatar
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    If you don't have a dial caliper (an inexpensive and extremely useful tool you can get at Home Depot) then take the bike down to your LBS and let them fix you up. If you do have a dial caliper, measure the seatpost diameter and tell your LBS what size you need.

    Personally I like to measure the size myself so I know I have the correct reading.

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