The sophisticated design of Columbus Carbon Fiber Lab, the XLR8R
(read"Accelerator") seat post is a professional product, intended to
beassembled on race bikes, for road use. It is made by layering
T-700carbon fiber fabric layers, alternating it with of super resistant
HighModulus Carbon Fiber, correctly positioned to optimally bear
theflexion stresses.
The seat post clamp, in CNC-processed
light aluminumalloy is 22 mm behind the pillar axis, to make
inclination and correctforward movement of the saddle easy and rapid.
Before
launching XLR8R,Columbus performed a thorough analysis of the products
on the market.The collection of information "in the field", which was
done by puttingthe different available carbon fiber seat posts to
tests, showed thatthe most stressed and therefore most delicate part of
this piece is thestem. One of the major causes of its weakness (which
in the mostserious case can lead to the failure of the component) can
beattributed to the dangerous effect of local incisions, caused by
thecompression of the two edges of the seat tube (which are often
sharp)following the closure of the seat clamp.
On XLR8R this problem does nothappen: the new Columbus seat post is equipped with an ANTI COMPRESSION CHANNEL
that is properly molded, made starting from the minimum insertion line.
When the seat clamp is closed, the Anti Compression Channel (A.C.C.)
negates the local compression effect by evenly distributing the closure
pressure along the entire circumference of the saddle pillar. The
tightening is therefore optimal and does not compromise the integrity
of the seat pillar, respecting, of course, allowed torques.
The
Anti Compression Channel also has the function of bracing the stem in
the longitudinal direction. The channel is covered with a rubber gasket
that, in addition to preventing water, mud and dirt from getting inside
of the A.C.C., is equipped with adjustment notches to quickly reference
the pillar height.
Columbus XLR8R Carbon Seat Post
