Cane Creek THUDBUSTER ST User manual

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1Barrel nut (2)
2Upper clamp
3Saddle rails
4Lower clamp
5Cradle
6Spherical washer (2)
7Clamp bolt (2)
8Adjustment knob
9Seat pillar
10 Minimum insertion line (100mm)
11 Arm - ST (4)
12 Pivot washer (8)
13 Elastomer - ST
14 Arm bolt, 16mm (4)
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2
3
6
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Grease
this
surface
Cane Creek Cycling Components | 355 Cane Creek Rd., Fletcher, NC 28732 | 800.234.2725 | [e-mail] | canecreek.com
Rider Weight Minimum Elastomer
Recommendation
(Pounds) (kg)
Under 100 Under 45 extra soft - #1*
100-140 45-64 soft - #3
140-190 64-86 medium - #5
190-250 86-114 hard - #7
Over 250 Over 114 Exceeds post limit
*#1 (extra soft) and #9 (extra hard) elastomers are available
separately from www.canecreek.com
Rev. 11/2013
NOTICE! The Thudbuster must be set-up with
appropriate elastomer before riding (See below).
Maximum allowable rider weight is 250 lb (115kg).
SELECTING ELASTOMERS
The Thudbuster ST can be tuned for different
weight riders and riding styles by selecting the
correct elastomer. Start with the softest
elastomer recommended for a given rider
weight. The Thudbuster ST is shipped with a
soft, medium, and hard elastomer. You may
desire to increase the stiffness by using harder
a elastomer. Never use a softer elastomer than
recommended for your weight.
INITIAL INSTALLATION
1. Note your current saddle height and fore/aft position to duplicate it with the Thudbuster.
2. Remove your current saddle and seatpost.
3. Confirm your new Thudbuster seatpost (or shim) diameter is the same as your old
seatpost. (Thudbusters are available in six direct fit sizes between 25.4 and 31.6 mm.)
4. Grease the shim (if applicable) and seat pillar before installing. DO NOT lubricate seat
tubes of Carbon frames (unless specified by the manufacturer).
5. Insert the shim (if applicable) into the bicycle frame with the split aligned with the
split in the seat-tube.
6. Install the Thudbuster into the bicycle frame to approximately the correct height with the
extension marks on seat pillar facing the front of the bicycle.
7. Loosen the two saddle clamp bolts (front and rear) until the threads are barely engaging
the barrel nuts (1 or 2 threads). Be sure grease is applied to the interface between the
lower clamp and cradle.
8. Place one rail of saddle in position between the upper and lower clamps. Then rotate
saddle so the other rail slips over the far edge of the upper clamp and into position in the
rail grooves of the lower clamp.
9. Begin to tighten the front and rear clamp bolts. The saddle tilt
adjustment is controlled by these two bolts. Check that the
saddle tilt and fore/aft position of the saddle are correct
before final tightening. The front bolt can be adjusted by
hand or hex wrench, but the rear bolt must be tightened
to 60 in*lb (6.8 N*m) with a 4 mm hex wrench. Be sure
all the components of the clamp are installed as
shown in section view. (Figure 1)
10. Adjust the saddle height if necessary.
THUDBUSTER ST INSTRUCTIONS

Cane Creek Cycling Components | 355 Cane Creek Rd., Fletcher, NC 28732 | 800.234.2725 | [e-mail] | canecreek.com
CHANGING ELASTOMER
1. Using a 3 mm hex wrench, loosen the two screws on the front arm assembly—one on each side.
2. Slide one half of the front arm off the pivots. Wiggling the saddle fore and aft while pulling on the arm half will make it
easier to remove.
3. Push the elastomer out of the linkage pockets.
4. Insert the new elastomer in the linkage pockets. Be sure to orient the elastomer properly. The concave cuts should be
on the top and bottom enabling clearance for the front clamp bolt on the underside of the cradle.
5. Check that the brass washers are still in place on the pivot pins.
6. Reassemble the front arm half on the pivot pins being careful not to pinch the elastomer.
7. Reassemble the two screws and tighten to 30 in*lb (3.4N*m).
The Thudbuster ST elastomer is made from natural rubber for its favorable damping characteristics but unlike the urethane LT
elastomers, natural rubber can not be effectively colored and as a result all ST elastomers are black. To identify the stiffness of each
ST elastomer, find the small dial that is molded into one side. The arrow indicates the elastomer’s relative stiffness. 1 is extra-soft
while 9 is extra firm, 5 is medium. This elastomer is a #3 or “soft” model.
MAINTENANCE
1. The pivot washers should occasionally be lubricated with a light oil.
2. The skewer and elastomers must be lubricated periodically with grease. Apply grease to the shaft of the skewer and to the
ends of the elastomers. The elastomers must be removed and reassembled as explained in the changing
elastomers section of the instructions.
NOTICE! If you ride in muddy conditions, using either a fender or the Cane Creek Thudglove neoprene boot will protect the pivots
and extend the life of your seatpost.
NOTICE! Thudbuster seatposts are designed to absorb small bumps only. You should still stand up when encountering large
obstacles on the road or trail.
Thudbuster ST Instructions Rev.
7/2010
Cane Creek Cycling Components • 355 Cane Creek Road • Fletcher, NC 28732
ph: 828.684.3551 • fax: [phone] • web: www.canecreek.com • e-mail: [email protected]
WARRANTY
Thudbuster seatposts are warranted against defects in materials or workmanship for one year from the date of purchase. This warranty
applies to the original owner only. At their discretion, Cane Creek Cycling Components will repair or replace any defective seatpost
improper adjustment, lack of maintenance, crashes, or other conditions judged by Cane Creek Components to be abnormal, excessive,
or improper. It is mandatory that a Return Authorization Number (RA#) is received (by calling Cane Creek) before any return is made.
Additionally, a dated Proof of Purchase must accompany the seatpost when returned.
ELASTOMER IDENTIFICATION
The Thudbuster ST elastomer is made from natural rubber for its favorable damping characteristics but unlike the
urethane LT elastomers, natural rubber can not be effectively colored and as a result all ST elastomers are black.
This elastomer is a #3 or “soft” model.
MAINTENANCE
1. The pivot washers should occasionally be lubricated with a light oil.
2. The skewer and elastomers must be lubricated periodically with grease. Apply grease to the shaft of the skewer and to the ends of
the elastomers. The elastomers must be removed and reassembled as explained in the changing elastomers section of the instructions.
NOTICE! If you ride in muddy conditions, using either a fender or the Cane Creek Crudbuster neoprene boot will protect the pivots and
extend the life of your seatpost.
NOTICE! Thudbuster seatposts are designed to absorb small bumps only. You should still stand up when encountering large obstacles
on the road or trail.
WARRANTY
Thudbuster seatposts are warranted against defects in materials or workmanship for one year from the date of purchase.
This warranty applies to the original owner only. At their discretion, Cane Creek Cycling Components will repair or replace
any defective seatpost with the same or comparable model. This warranty is void if the seatpost is damaged as a result of
abuse, alterations, modifications, improper adjustment, lack of maintenance, crashes, or other conditions judged by Cane
Creek Components to be abnormal, excessive, or improper. It is mandatory that a Return Authorization Number (RA#) is
received (by calling Cane Creek) before any return is made. Additionally, a dated Proof of Purchase must accompany the
seatpost when returned.