DUAL-POSITION 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
specifications (or the bike manufacturer’s torque specification). Periodically check all fasteners for tightness
using a torque wrench, since fasteners can loosen under the influence 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.
• When moving the seatpost between the road and aero positions, be careful not to pinch your fingers or hands
between the moving linkages.
• 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 find
any cracks or damage, immediately cease using the part and contact Redshift Sports customer service.
• This seatpost is intended for road use only. Off-road use may lead to slippage or breakage of the component,
possibly causing serious injury or death.
• Using the forward (aero) seatpost position can affect a bicycle’s handling characteristics. Following installation,
practice using the seatpost at low speed in a safe area to get used to the bicycle’s handling and steering.
• 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 buying Redshift Sports Dual-Position Seatpost. The
seatpost lets you switch on-the-fly between road and aero positions,
letting you choose the best position for every part of every ride.
This seatpost is different 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.
Improper installation or use may void the product’s warranty policy.
Check out www.redshiftsports.com/faq for instructional videos and
additional resources.
INSTALLING THE SEATPOST
1.
WARNING!
This seatpost is designed for bicycle frames with a 27.2mm diameter 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
greater than 100 mm (4 in.) in length. Using the seatpost in a different diameter seat tube
without an appropriate shim may cause damage or failure of the seatpost or bicycle frame.
2. Prior to removing your existing post, you may wish to measure the existing height, fore-aft
position, and angle of your saddle for future reference.
3. 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.
4. With the seatpost linkage in the rearward road position, loosen the rear saddle clamp bolt (#6b) until the
top of the bolt is threaded approximately halfway out of the rear saddle clamp nut (#4).
5. Grasp the seatpost tube (#1) and press firmly on the rear of the linkage to shift the seatpost linkage
forward into the aero position.
WARNING!
When moving the seatpost linkage between the road and
aero positions, be careful not to pinch your fingers or hands between the linkages.
6. Loosen the forward saddle clamp bolt (#6a) until the top of the bolt is threaded approximately halfway
out of the forward saddle clamp nut (#4).
7. Position your saddle between the lower saddle clamp (#2) and upper saddle clamp (#3).
4
3
2
5
6a
1
5
6
3
FRONT
ADJUSTING SADDLE TILT
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.
12. Saddle tilt is adjusted by loosening and tightening the two saddle clamp
bolts (#6). To access the rear saddle clamp bolt, shift the seatpost linkage
rearward into the road position (see Figure). To access the forward saddle
clamp bolt, shift the seatpost linkage forward into the aero position (see
Figure).
13.
To tilt the saddle forward
, using a 4mm hex wrench, first loosen the
rear saddle clamp bolt, then lightly tighten the forward saddle clamp bolt.
14.
To tilt the saddle backward
, using a 4mm hex wrench, first loosen the
forward saddle clamp bolt, then lightly tighten the rear saddle clamp bolt.
15. Using a torque wrench, tighten the rear saddle clamp bolt (#6b) to 4.0
N-m (35 in-lb).
16. Using a torque wrench, tighten the forward saddle clamp bolt (#6a) to 4.0
N-m (35 in-lb).
17. Repeat steps 12-16 as necessary until the desired saddle angle is achieved.
If you experience any saddle slippage during riding, repeat steps 12-16
tightening the bolts to a maximum of 5.0 N-m (45 in-lb).
SEE OTHER SIDE FOR ADDITIONAL ADJUSTMENT INSTRUCTIONS
AERO POSITION
ROAD POSITION
4mm Hex
4mm Hex
8. Loosely finger-tighten the forward saddle clamp bolt (#4) to hold the saddle in place temporarily.
9. Insert the seatpost into your bicycle seat tube to the 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.
10. Tighten the bicycle’s seatpost clamp bolt according to the bicycle manufacturer’s torque specification.
11. Position the saddle in the desired fore-aft position within the saddle clamp and follow steps 12 through
20 below to set the saddle tilt.
6b
#
QTY
PART NAME
1
1
Seatpost & Linkage
2
1
Lower Saddle Clamp
3
1
Upper Saddle Clamp
4
2
Saddle Clamp Nut
5
2
Saddle Clamp Spherical Washer
6a
1
Saddle Clamp Bolt (Front 35 mm)
6b
1
Saddle Clamp Bolt (Rear 30 mm)
