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  1. #1
    What's your Fetish, eh? veneer's Avatar
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    Is it safe to hack it off?

    ok, i got an American Classic Seatpost along with my buildkit. however, the length is way too long and they dont' have anything around 280-300mm lenght for me to trade with.

    so now i have this 350mm alu. seatpost that i know for sure will be too long for me to use. so would it be safe to hack of what i don't need, as long as i keep the same lenght for the min. insertion mark?
    wooohooo... isn't great to be in Sunny California???

  2. #2
    Senior Member DieselDan's Avatar
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    I've done it with much less expensive posts, usually to replace a post on a child's bike.
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

  3. #3
    Senior Member phinney's Avatar
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    Hack away

  4. #4
    What's your Fetish, eh? veneer's Avatar
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    i know if today if it was a carbon seatpost then i probably wouldn't hack it.. but given that it's alu. i don't see any integratity problems. so yup.. unless if that buyer comes through with the dough.. otherwise.. time to meet my SAW!
    wooohooo... isn't great to be in Sunny California???

  5. #5
    Senior Member Surferbruce's Avatar
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    use a pipe/hose clamp for a guide to get a nice square cut, then sand the edges a little and you're good to go.

  6. #6
    Somewhere in CA
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    suferbruce is right, used to be common to chop posts down using the pipe cutter. just keep in mind the minimum insertion point and deburr that bad boy when you are done

  7. #7
    ODB to those that know me outdoorboy's Avatar
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    Bob Vila says, "measure twice, cut once."
    Visit ArkansasOutside.com. Lets go play outside in the Natural State!

  8. #8
    What's your Fetish, eh? veneer's Avatar
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    ok.. not i just gotta find me a pipe cutter... probably my local home depot will have it right?

    i need something like these right: PIPE CUTTER
    wooohooo... isn't great to be in Sunny California???

  9. #9
    Chronic Tai Shan ofofhy's Avatar
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    Quote Originally Posted by veneer
    ok.. not i just gotta find me a pipe cutter... probably my local home depot will have it right?

    i need something like these right: PIPE CUTTER
    If you have a hacksaw, why buy a pipe cutter?
    From Craig's List: IF its a singlespeed that means----all the other parts are broken cut off and dumped...dont buy singlespeeds, the bikes will make your balls fall off

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  10. #10
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    the key is not really the minumum insertion mark. Many seatposts are marked for old style frames where the top of the seat tube lug is right next to the top of the top tube. But I have a compact style frame that has a significant length of seat tube protruding above the top of the top tube, maybe 3 inches or so.

    What you want to do is make sure that the bottom of the cut seatpost protrudes below the bottom of the top tube inside the seat tube when clamped at the correct height for you.

    This ensures that you get the structural benefit of the top tube and seat stay cluster in resisting the bending imposed by your body weight.

  11. #11
    Now with racer-boy font! Moonshot's Avatar
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    Don't breathe the aluminum dust. It's toxic.

  12. #12
    Sometimes knows stuff. rmfnla's Avatar
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    Quote Originally Posted by Moonshot
    Don't breathe the aluminum dust. It's toxic.

    Explosive, too (really!).
    Today, I believe my jurisdiction ends here...

  13. #13
    What's your Fetish, eh? veneer's Avatar
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    yeah i got a hacksaw... but using a pipe cutter will be easier. perhaps my neighbor has it.. since he's in construction field.

    i use the hacksaw for my alu. fork steerer.
    wooohooo... isn't great to be in Sunny California???

  14. #14
    What's your Fetish, eh? veneer's Avatar
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    Quote Originally Posted by vainamoinen
    the key is not really the minumum insertion mark. Many seatposts are marked for old style frames where the top of the seat tube lug is right next to the top of the top tube. But I have a compact style frame that has a significant length of seat tube protruding above the top of the top tube, maybe 3 inches or so.

    What you want to do is make sure that the bottom of the cut seatpost protrudes below the bottom of the top tube inside the seat tube when clamped at the correct height for you.

    This ensures that you get the structural benefit of the top tube and seat stay cluster in resisting the bending imposed by your body weight.
    i have a traditional frame, where there isn't a lot of seat tube protruding.. so i think it should be ok.
    wooohooo... isn't great to be in Sunny California???

  15. #15
    the commutor / tourer mcavana's Avatar
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    dude,

    just so you know, it would take about 3 minutes with a fresh hacksaw blade to cut it. Forget the pipe cutter, and use what you have. throw it in a vice, mark your line all the way around it, and cut away. touch up with a file when completed. You could have done it in the amount of time that it took me to type this reply!!!
    "Ready to retire, just can't afford it yet!"

  16. #16
    What's your Fetish, eh? veneer's Avatar
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    lol.. thanks mike.. i'll keep that in mind. damn that's a nasty cut u got there... hope ur fine now..
    wooohooo... isn't great to be in Sunny California???

  17. #17
    Senior Member Surferbruce's Avatar
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    actually i was refering to using a cheap hose type clamp just to keep the hacksaw blade straight. i don't even bother with that, just hack away, but it always comes out a little crooked without a guide.
    a pipe cutter would be the primo way but it's overkill to buy one. you could always have em do it at the hardware store. they'd prob. do it for free.

  18. #18
    What's your Fetish, eh? veneer's Avatar
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    surferbruce... yea, actually my neighbor has a pipe cutter.. he'll bring one home from work one of these days, then i'll get to use it.. hehe
    wooohooo... isn't great to be in Sunny California???

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