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Seat post non-awesomeness: Death to the reinforcement.
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GYXU > General > Seat post non-awesomeness: Death to the reinforcement. 25 May 2005 22:39:19

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Seat post non-awesomeness: Death to the reinforcement.

Fuego 25 May 2005 17:45:26
 
Last night I finally patched my trials uni's tire and rode around on it
for a while , because I wanted to see how high I could hop on a smaller
lighter uni.

However, when trying a little rolling hop the seatpost simply bent
backwards. Needless to say, it was a WEIRD feeling.


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Fuego 25 May 2005 17:46:07 permanent link ]
 
Nekst:


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--
Fuego - Has a Brain

"Unicycling is more about the center of concentration than the center of
balance."

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Loosemoose 25 May 2005 17:57:19 permanent link ]
 
Ouch... Looks like your extention/stiffenin­g bar has split open the seat
post. Let me guess, you did it when pulling up on the seat handle going
into a rolling hop? The force will have been transferred down the
extension and the extra leverage (over the under-seat mounting point)
caused this force to split the seat post... I've never seen anyone
literally rip their saddle off their post just by pulling it! Nice
job!

Next time, a stronger seat post might be preferable. Shame the
stiffening plate is welded on though, it'll be a pain to swap over or
make a new one. Its always a bit disheartening when something goes
bad...

Loose.


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Catboy 25 May 2005 18:23:20 permanent link ]
 
Fuego wrote:> *Nekst: *



Do I see a resemblance?


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Catboy - I enjoy the taste of dirt!!!

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Rogeratunicycledotcom 25 May 2005 21:02:48 permanent link ]
 
Couple of things you can do to sort this. You are obviously an animal
in the way you ride and need the reinforcement... I mean this in a nice
way. :-)­
When welding your reinfocement on you need to put a lot less heat in to
the tube, fully welding is of no use really, you need to stitch weld.
Go for one of the new Unicycle.com seatposts. I think you are on 22.0
seatpost so you should be able to get one of the extra thick version
from Unicycle.com USA.
This should deal with it.

Have fun.


Roger


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Murde Mental 25 May 2005 21:35:48 permanent link ]
 
hehe the same thing happened to me at Toque, or atleast would have in
the sense that I was testing out this metal handle that attaches to the
seat-post but it turned out that the extra leverage just bent the
seat-post. So.... I no longuer use it as a handle... but it does make
spiffy inexpensive seats with rake!


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Kington99 25 May 2005 22:22:59 permanent link ]
 
Lol, are you familiar with the term 'stress concentration' ? If you
build another seat post with similar reinforcement then curving the edge
of the reinforcement plate down so it runs more parallel to the post
before ending should help spread that point load out to reduce
failure.

Dave


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Fuego 25 May 2005 22:39:19 permanent link ]
 
Lol, are you familiar with the term 'stress concentration' ? If you> build another seat post with similar reinforcement then curving the> edge of the reinforcement plate down so it runs more parallel to the> post before ending should help spread that point load out to reduce> failure.


Yeah, that's what I figured happened. The post was also weakened by the
welding, I think. I didnt' actually weld it, I had a shop do it for me.


I'm not sure if I'm gonna build another. If I do, I'm gonna do it when I
fix my trials. i'm currently in love with my MUni, so I'll be fine as
for unis to ride. I have a spare seatpost, too.
Go for one of the new Unicycle.com seatposts. I think you are on 22.0> seatpost so you should be able to get one of the extra thick version> from Unicycle.com USA. > This should deal with it. >


I really like my post on my KH MUni. It's incredibly beefy, quite a bit
thicker than this one, which is a unicycle.com knurled one I got last
fall. It was new back then, I think.

EDIT: I think I'm just way too hard on equipment. This is just another
on the wall of shame for me. I've got a rim, 3 or 4 sets of cranks, 2
other seatposts. It's a nice little collection.


--
Fuego - Has a Brain

"Unicycling is more about the center of concentration than the center of
balance."

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GYXU > General > Seat post non-awesomeness: Death to the reinforcement. 25 May 2005 22:39:19

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