Cannondale Headshok Silk Road 1999 User manual

1.
1999 HEADSHOK®SILK ROAD®OWNER’S MANUAL
Congratulations and thanks for your purchase of a HeadShok Silk
Road suspension fork. The hydraulic DD15 cartridge in the Silk
Road fork is designed to give a smooth, comfortable ride by absorb-
ing minor impacts and hand numbing vibrations which cause rider
discomfort and which actually slow the forward momentum of the
bicycle. You have invested in a light weight suspension system fea-
turing adjustability, absolute steering precision, and an “On-the-Fly”
lock-out for increased efficiency climbing or sprinting. All of this
translates into a faster, more enjoyable ride with less rider fatigue.
This manual contains important and useful information regarding
proper operation, care, and maintenance of your HeadShok Silk Road
fork. Please read and carefully follow these instructions for miles of
safe, high performance riding. If you have any questions about your
fork or the contents of this manual, don’t hesitate to contact us.
See the back page for phone numbers and E-mail contacts.
Silk Road suspension forks offer 15mm
of travel using a coil spring with a col-
umn of MicroCellular Urethane (MCU)
running through its middle. They also
feature the shim-valved DD15 hydraulic
damper cartridge which controls the
rebound speed of the spring and can
be locked out “On-The-Fly” by turning
the Damping DialTM, located atop the
handlebar stem (See Fig.1,) And unlike
other suspension forks which slide over
high friction bushings, Silk Road forks
roll inside the head tube on 88 needle
bearings for unsurpassed smoothness of
travel. Lack of static friction (“stiction”)
combines with the damped, dual rate
spring system to be sensitive to both
high frequency road buzz and to minor
front wheel road impacts.
Fig.1 ▼
Open Locked-out
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WARNINGS:
HeadShok forks should be installed and adjusted by a quali-
fied mechanic. Brakes must also be installed and adjusted
by a qualified mechanic. If the brakes are improperly instal-
led or adjusted, the bicycle will not be safe to ride. Improper
installation, service, or adjustment of the fork or brakes will
place the rider in danger of serious injury or death.
Use great care and pay close attention to the road or trail in
front of you while turning the Damping Dial. Adjusting the
fork can be distracting, and it is possible to lose control of
the bicycle if your eyes wander from the surface directly in
your path. Also remember that your balance and steering
control change as soon as your remove one hand from the
handlebars, and that your hand is further from the brake
lever. If you are at all unsure of your ability to control the
bike while adjusting the suspension fork, or if you are on
a rough surface or a busy road, please stop before attempt-
ing to adjust the fork.
The HeadShok Silk Road fork is designed to be ridden
on paved surfaces only. This fork is NOT designed for off-
road use. Use of the HeadShok Silk Road fork for off-road,
cyclo-cross, or in otherwise abnormal, excessive, or improp-
er conditions will void the fork’s warranty. Such misuse
also places rider in danger of physical injury or death.
The HeadShok Silk Road fork must be ridden with a front
caliper brake installed through the fork crown. Riding this
fork without a front brake will void the fork’s warranty. Such
misuse places the rider in danger of physical injury or death.
2.
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3.
If the fork ever begins to make “knocking” or “klunking”
noises, or if it ever shows an unexplained increase in travel,
or looks like it is extended farther than it was originally, or
if the fork loses its ability to lock out, stop riding the bike
and bring it to a HeadShok dealer for inspection. Possible
indications of a problem are:
■ An increase in the fork’s extension or travel.
■ A stretched-out fork boot (See above.)
■ A stretched or strained front brake cable.
■ “Knocking” or “klunking” noises coming from the fork.
■ A sudden loss of lock-out ability.
If any of the above symptoms are ignored, the result could
be a separation of the fork from the bicycle frame, leading
to an accident with risk of serious injury or death to the rider.
NORMAL
BOOT
STRETCHED-
OUT BOOT
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4.
STEM SELECTION
All HeadShok equipped bicycles come with a CODA®Suspension
Stem that is designed to work specifically with the unique head tube
arrangement of the HeadShok front suspension system. These stems
are supplied in sizes proportional to the different bicycle frame sizes.
There are eight different stem sizes for drop type handlebars (26.0
mm clamp), each of which can also be inverted for 16 possible
unique rider positions. This allows anyone to customize the fit of
his or her bicycle. See your Authorized Cannondale Retailer for re-
placement CODA stems. Framesets and aftermarket forks do not
include a stem.
REQUIRED MAINTENANCE
It is recommended that you take your Silk Road fork to your Autho-
rized HeadShok Service Center for a regular tune up every three
months or 60 hours of riding. Your fork is a high performance sus-
pension system and needs regular inspection, lubrication, and main-
tenance. Your mechanic will check the following items and service
the fork as necessary. Between these tune ups, you should also occa-
sionally check the top bearing seal and boot as outlined below.
HEADSET BEARINGS:
Every few rides, or every time that the bicycle is exposed to water
(rain, mud, or washing) a few drops of lightweight oil should be
applied to the upper headset bearing seal (located just below the
stem.) This seal must be kept lubricated, as it protects the head-
set cartridge bearings from contamination by water and dirt. Fail-
ure to keep the headset bearing seal lubricated will result in pre-
mature bearing wear.
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5.
SUSPENSION FORK BOOT:
Frequently inspect the rubber boot at the base of the headtube for
tears or cuts which could allow contamination. If the boot is dam-
aged in any way, it must be replaced immediately. Since boot re-
placement requires the suspension fork be removed from the frame,
this job should be performed only by an experienced bicycle mechan-
ic at an Authorized HeadShok Service Center. Damage to the Head-
Shok due to contamination by water or dirt will not be covered under
warranty.
HYDRAULIC CARTRIDGE OIL OR SEAL REPLACEMENT:
The oil in the HeadShok hydraulic DD15 hydraulic cartridge should
be replaced every 80 hours of riding, or at least once a year. The
seals in the cartridge require less frequent attention, and should
be replaced every two years or as needed. These procedures require
unique tools and substantial expertise and training with hydraulic
suspension systems. Therefore, they should be performed only by an
experienced mechanic at an Authorized HeadShok Service Center.
NEEDLE BEARING LUBRICATION:
The needle bearings which provide the smooth travel of the suspen-
sion in the HeadShok fork should be lubricated every three months or
60 hours of riding. This procedure requires partial disassembly of the
suspension fork, and therefore must be performed only by an experi-
enced bicycle mechanic at an Authorized HeadShok Service Center.
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6.
PRELOAD ADJUSTMENT
Before the bike is ridden, spring preload must be adjusted to suit the
weight and preference of the rider. Preload should be adjusted when
the bike is new, and then readjusted for each individual who rides
the bike.
1. Make sure the Damping Dial is in the “Open” position by turning
it to the left (counter-clockwise.)
2. Remove the small bolt from the center of the Damping Dial.
3. With rider off the bike, measure from
floor to center of one end of the handle-
bar with the bicycle standing perfectly
upright. Then position the rider on the
bike in a seated, natural riding position.
With only the rear brake applied, again
measure the distance from the floor to
the center of one end of the handlebar.
4. The difference in these two measure-
ments is the preload sag. Most riders
find the best suspension performance
with about 1/16” sag compression.
To change the amount of sag, insert
a 3mm Allen wrench into the hole in
the top of the fork. Turn the preload
adjustment screw clock-wise for great-
er preload (less sag compression) or
counter-clockwise for less preload
(more sag compression.) See Fig.2.
Fig.2 ▼
3mm
_+
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7.
5. When desired preload is set, replace the Damping Dial bolt.
NOTE: This procedure is to be used as a guideline only. We encour-
age riders to experiment with preload adjustment. Some prefer a
stiffer suspension, some a softer, more compliant suspension.
DAMPING ADJUSTMENT
Damping controls the speed at which the suspension moves. Com-
pression and rebound damping of the Silk Road fork can be adjust-
ed by changing the viscosity of the hydraulic oil within the cartridge.
Since this procedure requires several unique tools and expertise
with hydraulic suspension systems, it should only be performed by
an experienced bicycle mechanic at an Authorized HeadShok Service
Center. See your dealer for more information regarding the fine
tuning of your HeadShok fork.
HEADSHOK WARRANTY
All HeadShok forks and their internal assemblies are warrantied
against manufacturing defects in materials and/or workmanship
for a period of one year from the date of original retail purchase.
Not covered under warranty is damage resulting from improper
adjustment or maintenance, lack of maintenance, crashes, or
use judged by HeadShok to be excessive or abusive.
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JCH/PCA #107401 080498 ©Cannondale Corp. 1998, 16 Trowbridge Dr., Bethel, CT
Please note that this manual is meant to supplement, not replace,
your bicycle owner’s manual. The bicycle owner’s manual contains
valuable information regarding safe operation, adjustment, and main-
tenance of your bicycle, as well as more complete warranty infor-
mation. Please read the bicycle owner’s manual thoroughly before
riding your bicycle, and keep it and this booklet for future reference.
GETTING IN TOUCH WITH HEADSHOK
For warranty related questions or for more information on this or any
HeadShok product, please feel free to contact us.
USA and Canada: (888) HEAD-SHK
Europe (EC): (31) 5415-89898
Japan: (81) 722-99-9399
Australia: (612) 9979-5851
http://www.headshok.com
[email protected]
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