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  1. #1
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    Seat Sliding down

    I'm new to biking having a problem keeping the seat up. I'm 245lbs and 6-6. The seat is up pretty high and when I get to going and bouncing down rocks and steep hills I have to stop and pull the seat up. Is there anything out there that can clamp the seat a little tighter? If so were can I buy them on the web. Thanks,

  2. #2
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Quote Originally Posted by markhubert13
    I'm new to biking having a problem keeping the seat up. I'm 245lbs and 6-6. The seat is up pretty high and when I get to going and bouncing down rocks and steep hills I have to stop and pull the seat up. Is there anything out there that can clamp the seat a little tighter? If so were can I buy them on the web. Thanks,
    Yep.......
    it's called a wrench or Allen Wrench Just watch you don't crimp the tube and if you have a carbon frame or seatpost, use a torque wrench to get it to the proper torque!
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

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  3. #3
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    I have a seat spinning and thumb clamp now. It can with the bike. are you saying that there is another type of clamp??

  4. #4
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    seat binder

  5. #5
    The Site Administrator: Currently at home recovering from a couple of strokes,please contact my assistnt admins for forum issues Tom Stormcrowe's Avatar
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    Quote Originally Posted by markhubert13
    I have a seat spinning and thumb clamp now. It can with the bike. are you saying that there is another type of clamp??
    Just change out the bolt to something else that requires an Allen wrench and use a ratchet with the appropriate size Allen Hex. Don't overtighten it or you can crimp the tube and seatpost, both. This weakens the structure of the bike seriously.
    on light duty due to illness; please contact my assistants for forum issues. They are Siu Blue Wind, or CbadRider or the other 3 star folk. I am currently at home recovering from a couple of strokes. I am making good progress, happily.


    . “He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you.”- Fredrick Nietzsche

    "We can judge the heart of a man by his treatment of animals." - Immanuel Kant

  6. #6
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    Get a second seat post collar clamp whatever. Instead of putting it on the frame tube mount it on the seat post itself. Best to buy from a LBS as sizing to a seatpost, not a tube, is non standard.

    https://secure15.nexternal.com/share...products%2Easp
    2000 Montague CX, I do not recommend it, but still ride it.
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    Wieleder CARiBIKE (folding), decent frame.

  7. #7
    Chubby super biker bdinger's Avatar
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    I had the same problem with the cheapo clamp that came on my Specialized. After trying with no avail to get it to work, I went to the LBS and they sold me a rather stout clamp that you screw on with a allen wrench. Darn thing hasn't moved a MM since .

  8. #8
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    I hate tohose clamps- get the mother replaced or tighten the hell pout of it. get it to your ideal height, get a pliars or something on the other end and make sure it doesn't move when spinning the actual clamp. then when it's too tight to use your hand, get a hammer and bash the hell out of it to turn it over and lock it. That's what I had to do after I got hit. The piece of crap was loose enough and A car hit me from the side, the whole seat spun as I fell. I fell onto it and I had literally black bruised nuts.

  9. #9
    Perma-Clyde (51)'s Avatar
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    Quote Originally Posted by bluepython723
    I get pliers or something on the other end and make sure it doesn't move when spinning the actual clamp. Then when it's too tight to use your hand, get a hammer and bash the hell out of it to turn it over and lock it.
    Atta boy. No work is complete unless you take a hammer to it. You should see the hammer marks on my cranks after I got frustrated with a week of 'clicking' noises.
    http://www.trailerparkboys.org/forum...fault/beer.gif In wine there is wisdom, in beer there is freedom, in water there is bacteria. -Ben Franklin

  10. #10
    Paste Taster Retem's Avatar
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    just buy a sugino seat binder bolt or a seat post clamp if it is a seperate peice and tighten that bad boy down with a wrench qr stuffs like that kinda stink
    I am dyslexic so bear with my posts.... [SIGPIC][/SIGPIC]

  11. #11
    Healthy and active twobikes's Avatar
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    My carbon seat post was slipping even with the collar properly torqued to 45 in lb. I moved the red reflector clamp down to the post collar and tightened it. It is like two clamps and has kept the post from slipping down.

    Specialized does have a technical bulletin on their web site that suggests a light sanding of a carbon seat post with 200 to 400 grit paper and applying powdered chalk to the post.

  12. #12
    don't try this at home. rm -rf's Avatar
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    Quote Originally Posted by geo8rge
    Get a second seat post collar clamp whatever. Instead of putting it on the frame tube mount it on the seat post itself. Best to buy from a LBS as sizing to a seatpost, not a tube, is non standard.

    https://secure15.nexternal.com/share...products%2Easp
    +1
    Get a collar that's similar to this. That should fix it.

    If not, this is from a slipping carbon seatpost BF discussion. You could try the paste for carbon posts. But usually aluminum posts require grease.
    You can buy tacx carbon paste at competitive cyclist.

    http://www.competitivecyclist.com/za...MODE=&TFC=TRUE

    Grease/nogrease is a controversial subject. You can't go wrong though with paste designed for carbon. The general consensus among manufacturers is no grease. This makes sense to me because as you have seen, greasing requires much more clamping force to acheive the same friction force as without grease or with paste.

    I think the risk of using nothing at all is getting your seatpost stuck.

  13. #13
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    One possibility nobody's suggested is that you have the wrong diameter seat post. It's unlikely, but it does happen, especially if you bought the bike used. A shop with a micrometer can measure it for you if it's not stamped on the post.
    An old-time last-ditch fix if nothing else works is to put a little automotive valve-grinding compound on the post where it goes into the seat tube. That increases the friction, and by the time it grinds down the post enough to matter, you'll be dead. But a new binder bolt will probably do the trick.

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