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Old June 11th 08, 04:07 PM posted to rec.bicycles.tech
jim beam
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Posts: 5,758
Default Single-Bolt Seatpost saddle slippage?

JG wrote:
Jim, it appears you have done what you constantly accuse Jobst of
doing - talked about something you haven't actually looked at.

The Campy SR post has a semi-circular top with the bolt below on an
inner radius. If it breaks, the clamp wants to slide off. The
Suntour Superb has a cradle top. Should one bolt fail, the clamp is
still cradled on the top of the post.


i'm aware of that design. and it doesn't have the immediate "dump" fail
mode of which jobst accuses it since the post head and the bottom of the
cradle are in compression. furthermore, the design which jobst holds up
as "superior" really isn't because one bolt at either end of a two-bolt
clamp is incapable of preventing tipping, so you're pretty much in the
same position.

as for ability to follow this thread, you're still making the mistake
jobst wants you to make. jobst's response is that of the righteous
victim. in reality, /he's/ the [unjustified] aggressor - and you need
to learn that distinction. if you can't follow the technical argument,
you're in a difficult position because in most cases, it would be
correct to assume that a "victim" was the one being wronged. but in
this case, the "victim" is actually the one doing the attacking, so
you're [successfully] being suckered.

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