Cannondale SuperSix EVO Owner's Manual page 100

PART II
(continued from previous page)
oem vs. Aftermarket fork Parts Compatibility
Your bicycle was shipped by Cannondale with a
compatible component specification. The fork, the
handlebar stem, the headset parts (i.e. spacers,
bearings, crown race), and the compression
assembly are parts of the system. Other handlebar
stems, headset parts, and compression assemblies
available to you from sources other than Cannondale
may not be compatible.
The Cannondale sI Compression Assembly - kP017/
Only the SI Compression Assembly KP017/
may be used in Cannondale carbon forks with a
carbon steerer tube. You may not use any other
compression assemblies: star nuts, expanding
wedge, or stems with an integrated compression
device or anything else. Incompatible parts can
cause serious damage (cracking, splitting, scoring, or
deformation) of the steerer tube.
A double flanged star nut may only be used in a
carbon fork with an alloy (metal) steerer tube.
Aftermarket handlebar stems
Many handlebar stem designs from many different
manufacturers are available. It is impossible
to provide a listing of compatibility based on
availability. Don't think availability means
compatibility. Here are some factors affecting
compatibility:
1. A compatible handlebar stem must be
compatible for use with the Cannondale SI
Compression Assembly KP017/.
2. The stem must be designed for use with carbon
forks having an 1 1/8 steerer tubes, without
adaptation or alteration of the stem or the
steerer tube. The surfaces must mate correctly.
3. The inside diameter of the stem clamping
surface must be smooth, free of burrs. It
must fit the outside diameter of the steerer
tube snugly with the clamp bolts completely
loosened. The stem surfaces in contact with the
steerer must be smooth, without interruptions
(large openings or holes). When clamped to the
recommended tightening torque, the stem must
not pinch or cause other impressions or cuts in
the steerer tube. Smooth and remove any burrs
with fine sand paper (220 is ideal).
4. Wedge clamping stems must not be used.
What you have To know When Installing or
Adjusting Any handlebar stem
The steerer tube length for any Cannondale carbon
fiber fork with a carbon steerer is limited to the
MAXIMUM STACK HEIGHT of 55mm. This affects
the height adjustment of the stem. No spacers may
be used on top of a stem. The stack measurement
method is shown on the following page. If the
steerer tube is cut to accommodate a lesser spacer
stack height, please observe the following:
1. Cutting must be done by a professional bike
mechanic experience d with carbon components.
2. To produce a straight cut, use a fork cutting jig
(e.g., Park Tool SG-6). See http://www.parktool.
com/tools/SG_6.shtml.
3. Do not clamp steerer tube directly in vice jaws
and/or cut the steerer free hand. Vice jaws
can crack or damage the surface of the steerer.
Locate the jig on the cut off end of the steerer
tube to avoid placing a clamping force on the
steerer tube which could produces cracks.
Alternatively, you can clamp the steerer in
grooved wooden blocks positioned in vice. Do
not over-tighten the vice.
4. Additionally, when cutting a carbon steerer
tube, use composites hacksaw blade (tungsten
carbide gritted) or a very fine toothed (36
toothed) new blade. To minimize fraying of the
carbon fibers, wrap the area of cut with masking
tape. Make only one clean complete cut. Do not
scratch, score, or mark the steerer tube surface
other than the complete cut. Scratching, scoring
or making other marks on the tube surfaces
other than the complete cut, or cutting the
steerer tube to an incorrect length for a specific
stem/headset can compromise the strength of
the steerer tube. After the steerer tube is cut,
round the cut edges smooth and remove any
burrs with fine sand paper (220 is ideal).
WARNING
We urge you to consult closely with your local
Cannondale Dealer. This will help to make sure
that any aftermarket choices you make are
compatible with your bike's OEM parts and will
not cause serious damage to your bike.
98