NINER ENCYCLOPEDIA
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SPECIFICATION & SETUP GUIDE
49
: Updated: SEPT 5, 2012
SEATPOST INSTALLATION
FIT CHECK
Check the post/frame for correct fit. Seatposts are available in many
diameters and correct sizing is critical - Niner specifies three common
sizes: 27.2mm, 30.9mm and 31.6mm. They are not interchangable.
Check the specs for your Niner frame in the GEOMETRY & SPECIFICATIONS
section of this document.
When checking fit, don’t insert the post more than approximately two
inches before removing it and following the FRAME PREP steps below.
FRAME PREP - ALUMINUM POST
Before inserting the post, inspect the end of the seat tube and the seat
tube clamp slot for burrs or sharp edges that could damage the seatpost,
resulting in post failure. Remove any burrs or sharp edges with 320/400
grit sandpaper.
Apply a thin film of grease to the post and inside the seat tube to ease
installation, adjustment and removal. Mount the seat collar so the bolt
tightens at the rear in a traditional manner.
FRAME PREP - CARBON POST
Before inserting the post, inspect the end of the seat tube and the seat
tube clamp slot for burrs or sharp edges that could damage the seatpost,
resulting in post failure. Remove any burrs or sharp edges with 320/400
grit sandpaper. Take extra care to smooth the sharp 90º corners around
the slot cut in the seat tube as these edges can easily score or damage
a carbon post. The seat tube MUST be free of all lubricants, use rubbing
alcohol to carefully clean the inside of the tube and remove all traces of
grease, dust or other compounds.
Apply a thin film of Carbon Assembly Compound (Tacx, FSA or other) to
the post and inside the seat tube to ease installation, adjustment and
removal. Mount the seat collar turned around 180 degrees so the bolt
tightens at the front opposite the slot in the seat tube. This orientation
better distributes clamping force around the carbon post and reduces the
possibility of carbon seatpost damage.
Pinch fractures in a carbon post caused by the seat collar and
seat tube are not covered by warranty, so please do not rush the
frame preparation steps or exceed recommended torque specs.
ASSEMBLY
Insert post and tighten the seat collar bolt to the manufacturer’s
recommended torque. NINER seat collars should be tightened to 4Nm, 35
inch-lbs or 2.9 foot-lbs.
