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  1. #1
    Ty
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    --------Safety Question--------

    Got my New USE Aien Carbon MTB a couple of days ago !


    This is the new MTB specific USE Carbon Post with thicker walls and no need for a shim.

    Straight on the scales!.........31.6mm/350mm = 198g.

    _________________________________________

    And now for the question:

    The minimum insertion mark on the post is 99mm from the base of the post.

    But I would like to run it only inserting 85mm into the frame.
    (leaving the minimum insertion mark 14mm outside the frame)

    This 85mm insertion covers the 2.5 x diameter of post inserted into frame rule. (2 x 31.6mm = 79mm)

    At 85mm insertion the post also goes past the base of the top tube by 22mm (almost 1 inch)

    see illustration below

    I shall also be smoothing the edges of the frame/seatpost clamp where the post is inserted and reversing the seat clamp 180° away from the frame split to a aviod stress riser.

    Now bearing in mind I ride this bike only on the tarmac streets of London and never off road (the most action it might see would be bunny hoping over a man hole) and I weigh around 11 stone (150 lbs) do you think this much post inserted into the frame should be all right?

    I know there have been stories of the 1st generation Alien Carbons snapping, but I believe this was sorted out by the second generation design, and this one is the new even thicker third generation MTB specific design. Or is a reduced insertion length more of a threat to your frame?

    Any input greatly appreciated.


    Ty
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  2. #2
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    no problem...

    USE is very careful now since they were faced with many problems with the older seatposts. the actual version you have is much heavier and is for sure no problem at your weight, on tarmac even when only a couple of centimeter would be inserted. the newe USE now is just for looks, nothing lighter than the Al-one...too bad!

    just have your frames seattube smoothed with emery cloth (ca. 400 or more) as sharp edges make for ugly scratches on the posts carbon tube....

  3. #3
    Ty
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    Thanks for your input Nino!

    214 people read this thread, 1 person gave their input!!!

    LOL!

    Ty

  4. #4
    Dat mah bike, punk!
    Reputation: misctwo's Avatar
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    Quote Originally Posted by Ty
    Thanks for your input Nino!

    214 people read this thread, 1 person gave their input!!!

    LOL!

    Ty
    i just accidentally closed a great porn webpage. argh.
    every thread needs an uploaded image of one kind or another.

  5. #5
    Dr. Frost
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    Not that this really applies but NICE PICS!

    Those are some fine drawings of the your post situation. Very nice!

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