REDSHIFT ShockStop User manual

SHOCKSTOP SEATPOST
INSTRUCTIONS
WARNING
!
• Failure to follow these instructions and warnings may result in malfunction or breakage of this component,
possibly causing serious injury or death.
• Always use a torque wrench when installing or adjusting fasteners, and always tighten to Redshift torque
specications (or the bike manufacturer’s torque specication). Periodically check all fasteners for tightness
using a torque wrench, since fasteners can loosen under the inuence of road vibration.
• This seatpost is designed for use in a 27.2 mm diameter seatpost. It may be used with larger seat tube
diameters by using an appropriate diameter shim longer than 100mm (4 in.) in length.
• Do not raise the post beyond the minimum insertion line.
• Periodically clean and inspect all surfaces of this component for hairline cracks or signs of damage. If you nd
any cracks or damage, immediately cease using the part and contact Redshift Sports customer service.
• This seatpost is intended for road and light o-road use only. It is NOT intended for extreme o-road use or
jumping. Unintended use may lead to breakage of the component, possibly causing serious injury or death.
• Never place your hands or ngers near the seatpost linkages while riding. Doing so may cause pinching or
crushing injuries.
• For metal-framed bicycles, ensure that the post and the inside of the seat tube are covered with a thin layer of
bicycle grease prior to installation. Failure to do so may cause the post to seize inside the bicycle frame.
Thanks for choosing the Redshift Sports
ShockStop Suspension Seatpost! The
seatpost provides tunable suspension to
increase comfort and performance
during your ride.
This seatpost is dierent than other
seatposts, so please read these
instructions and warnings completely
before installing or using the seatpost. If
you are unfamiliar with bike
maintenance or seatpost installation, or
if you lack the required tools, please visit
your local bike shop or contact Redshift
Sports customer service for assistance
([email protected]). Improper
installation or use may void the
product’s warranty.
Check out www.redshiftsports.com/faq
for instructional videos and additional
resources.
CHANGING SPRINGS
The ShockStop Seatpost ships with 2 springs – an outer spring which
comes pre-installed in the seatpost, and an inner spring which is
included in the package.
NOTE: THE OUTER SPRING MUST ALWAYS BE INSTALLED. The
inner spring can be optionally added when a stier spring rate is
desired.
COMPATIBILITY
This seatpost is designed for bicycle
frames with a 27.2mm diameter
circular seat tube. The seatpost may be
used with larger diameter seat tubes by
using the correct diameter seatpost
shim. In order to reduce stresses on the
post and frame, only use seatpost
shims of at least 100 mm (4 in.) in
length. Using the seatpost in a dierent
diameter seat tube without an
appropriate shim may cause damage or
failure of the seatpost or bicycle frame.
CHOOSING YOUR SEATPOST SETUP
The Shockstop seatpost is fully adjustable to t you and
your riding preference. Dierent springs can be used to
make large adjustments to the stiness, and then
ne-tuning can be accomplished by adjusting the preload
plug located at the bottom of the seatpost.
The chart shown here is a good starting point, but
dierent riders may prefer stier or softer settings
than the chart recommends. Riding position and
terrain can also dramatically aect the required preload
setting, so don’t be afraid to experiment with dierent
settings to nd your best ride!
*When using the Main Spring Only, the maximum recommended preload
setting is 4. Riders needing more preload should add the Inner Spring and
start at a lower preload setting.
Preload Plug
Spacer Tube
End Cap
End Cap
Main Spring
Optional
Inner Spring
(place inside
Main Spring)
5
11
10
9
9
8
7
2
3
6
4
1
# QTY PART NAME
1 1 Seatpost & Linkage
2 1 Lower Saddle Clamp
3 1 Upper Saddle Clamp
4 2 Saddle Clamp Nuts
5 2 Saddle Clamp Bolts
61 Fender
7 1 Preload Adjustment Plug
8 1 Spring Spacer
9 2 Spring Endcap
10 1 Main Spring
11 1 Inner Spring (Op�onal)
RIDER WEIGHT SPRING SETUP
SUGGESTED
INITIAL PRELOAD
< 110 lb / 50 kg Main Spring Only 1
132lb / 60 kg Main Spring Only 2
154 lb / 70 kg Main Spring Only 3
176 lb / 80 kg Main Spring Only 4*
198 lb / 90 kg Main + Inner Spring 2
220 lb / 100 kg Main + Inner Spring 3
242 lb / 110 kg (max) Main + Inner Spring 4
1. Remove seatpost from frame.
2. Turn seatpost upside-down and completely unscrew the preload plug.
This can be done by hand or by inserting a 4 mm hex wrench through
the side holes in the plug to provide additional leverage.
3. Tilt seatpost to slide internal components out the bottom of the
seatpost: spring spacer, spring(s) and spring end caps.
4. Insert or remove the inner spring inside the outer spring
5. Apply grease to the outside of the outer spring and spring end caps, if
needed.
6. Turn seatpost upside-down again and reinstall the internal
components, noting the order in the picture. The protective material
around the outer spring should be oriented towards the top of the
seatpost. The spring end caps should be sitting at against the
spring. When fully installed, the spacer tube should sit a few
millimeters inset from the bottom of the seatpost. If the spacer tube
is protruding from the bottom of the post, make sure the suspension
linkages are fully extended and make sure the spring end caps are
sitting at against the spring.
7. Re-install preload plug and adjust as-needed for desired suspension
rmness.
NOTE: The ShockStop Seatpost Di2 Battery
Holder Accessory (sold separately) will allow
you to securely mount a Di2 battery in the
bottom of the seatpost.

INSTALLING THE SEATPOST
STOP! THE SHOCKSTOP SEATPOST MUST BE SET UP WITH THE APPROPRIATE PRELOAD ADJUSTMENT
AND/OR SPRING COMBINATION BEFORE INSTALLING. SEE ‘CHOOSING YOUR SEATPOST SETUP” AND
“SETTING THE PRELOAD” SECTIONS FIRST!
NOTE: TO ACCOUNT FOR SUGGESTED 20% SAG THE INITIAL SUSPENSION TRAVEL WHEN YOU SIT
DOWN, YOUR SADDLE SHOULD BE POSITIONED 6 MM HIGHER AND 5 MM FURTHER FORWARD THAN
YOUR SADDLE POSITION WHEN USING A RIGID SEATPOST.
1. Prior to removing your existing post, you may wish to measure and record the existing height,
fore-aft position, and tilt angle of your saddle for future reference.
2. Remove your existing seatpost and saddle. Clean the inside of the bicycle’s seat tube and ensure that
the inside of the seat tube is free of burrs and sharp edges. Apply a thin layer of grease to the inside of
the seat tube. DO NOT grease seat tubes of carbon frames unless specied by the frame manufacturer.
3. Insert the seatpost into your bicycle seat tube to the approximate desired height. Do not twist the
seatpost during insertion. Ensure that the seatpost is inserted far enough into the seat tube that the
minimum insertion line on the seatpost is not visible above the frame’s seatpost clamp.
4. Tighten the bicycle’s seatpost clamp bolt according to the bicycle manufacturer’s torque specication.
WARRANTY
Redshift Sports LLC warrants that this product is free from defects in material and workmanship for two
years from the date of original retail purchase. This warranty applies to the original retail purchaser only,
and is not transferable to any subsequent purchaser(s). At their discretion, Redshift Sports will repair or
replace the defective product with the same model (or an equivalent model if an identical model is
unavailable). This warranty does not cover components that are damaged due to improper installation,
improper adjustment, poor maintenance, crashes, abuse, modication, misuse, or other conditions
deemed abnormal or excessive by Redshift Sports LLC.
All warranty returns must be accompanied by a Return Authorization Number (RA#) and dated
proof-of-purchase. You can obtain an RA# by submitting a warranty claim at www.redshiftsports.com or
by emailing [email protected].
SETTING THE PRELOAD
A preload adjustment of “1” is the softest setting. Turning the preload plug further into the seatpost
will increase the stiness and rm up the suspension. This can be done by hand, or if necessary, a
4mm hex wrench can be inserted through the side holes in the plug to provide additional leverage.
The rmest setting is with the preload plug turned all the way in (it does not need to be tight).
MAINTENANCE
The ShockStop Seatpost is designed to run quietly and smoothly with minimal maintenance. If you
encounter any issues with your seatpost, please visit redshiftsports.com/faq for instructional videos and
troubleshooting help, or contact us at [email protected].
NOTE: DO NOT USE GREASE OR ANY LUBRICATION ON PIVOT BUSHINGS. THEY ARE DESIGNED TO
RUN DRY AND WILL PERFORM BETTER AND LAST LONGER WITH NO LUBRICANT.
Preload set at 3.5 Preload set at 5
(maximum)
Preload set at 1
(minimum)
Preload set below
minimum
Warning! OK OK OK
✔
X✔ ✔
UNLOADED POSITION 20% SAG POSITION
Pivot shaft visible from side view Pivot shaft hidden from side view
Another general guideline is the “bounce test”. While riding on at ground, raise up o the saddle
and then sit down with some force to bounce the suspension. If it’s easy for you to reach the full
range of travel and you’re getting a noticeable “bottom-out” feel at the end of travel, you may want
to increase the preload.
8. Position the saddle in the desired fore-aft position within the saddle clamp.
9. Use a 4mm hex wrench to adjust the saddle angle by tightening or loosening the front or rear saddle
clamp bolts. Once the desired saddle angle is achieved, alternately tighten both bolts in quarter turn
increments, using a torque wrench for the front bolt and a standard hex wrench for the rear bolt. Stop
tightening both bolts once the front bolt reaches 6 N-m of torque. Do not exceed 9 N-m.
WARNING! ADJUSTING THE SADDLE CLAMP TILT BEYOND ITS RANGE MAY DAMAGE THE SEATPOST:
WHEN TIGHTENING THE REAR BOLT TILTING REARWARD, THE UPPER SADDLE CLAMP MUST NOT BE IN
CONTACT WITH THE REAR PORTION OF THE LINKAGE MECHANISM.
WHEN TIGHTENING THE FRONT BOLT TILTING FORWARD, THERE MUST BE A GAP OF
AT LEAST 2MM BETWEEN THE UPPER SADDLE CLAMP AND THE UPPER LINKAGE.
WARNING! DO NOT OVER TIGHTEN SADDLE CLAMP BOLTS! OVERTIGHTENING MAY LEAD TO
SEATPOST FAILURE, POTENTIALLY CAUSING SERIOUS INJURY OR DEATH. ALWAYS USE A TORQUE
WRENCH WHEN ADJUSTING SADDLE CLAMP BOLTS.
11. Install fender against rear linkage by placing the fender magnet on the front saddle clamp bolt.
12. Adjust saddle height if necessary.
5. Use a 4mm hex wrench to loosen the saddle clamp bolts
until the threads are barely engaged in the nuts. Install
the saddle between the upper and lower clamp. Some
saddle rail shapes may require the bolts to be fully
unthreaded from the nuts to install the saddle.
NOTE: POSITION LOWER CLAMP WITH LONGER RAIL
SUPPORTS TOWARD THE BACK OF THE SADDLE
6. If installing the seatpost fender, completely remove rear
saddle clamp bolt from the nut, loop fender o-ring
around bolt under the upper saddle clamp, and reinstall
bolt as shown in the picture.
As a general guideline for a comfortable setting, set the preload so that the suspension mechanism
moves down approximately 6mm (20%) from the top of its travel range when you are sitting in a
neutral riding position. The 20% sag point can be determined visually by removing the fender and
observing the linkage pivot shaft from the side (it may be helpful to enlist the help of a friend).
Adjust the preload setting such that the end of the silver pivot shaft is barely (but completely)
hidden from view by the side of the post when you are seated in a neutral riding position.
WARNING! DO NOT
SET THE PRELOAD
ADJUSTMENT BELOW
THE “1” MARK. DOING
SO CAN CAUSE
INTERNAL PARTS TO
LOOSEN OR FALL OUT
WHILE RIDING.
!
O-RING
TETHER
!
!
!
PRO TIP: Stick the
fender magnet to
your saddle’s rails to
keep it out of the
way while you
make adjustments.
BACK OF
SADDLE
FRONT OF
SADDLE
7. Use a 4mm hex wrench to lightly tighten the front and rear clamp bolts to
hold the saddle in place. Make sure that the hex wrench is inserted completely
into the hex hole in the bolt heads to avoid damaging or stripping the bolt.
Rev. 1