Cane Creek THUDBUSTER ST Instructions

THUDBUSTER ST INSTRUCTIONS
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.
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.
Cane Creek Cycling Components | 355 Cane Creek Rd., Fletcher, NC 28732 | 800.234.2725 | info@canecreek.com | canecreek.com
5
14
11
9
10
4
5
6
8
1 Barrel nut (2)
2 Upper clamp
3 Saddle rails
4 Lower clamp
5 Cradle
6 Spherical washer (2)
7 Clamp bolt (2)
Rider Weight
(Pounds) (kg)
Under 100 Under 45
100-140 45-64
140-190 64-86
190-250 86-114
Over 250 Over 114
*#1 (extra soft) and #9 (extra hard) elastomers are available
separately from www.canecreek.com
Rev. 11/2013
2
3
13
11
12
1
2
3
Grease
this
6
surface
7
8 Adjustment knob
9 Seat pillar
10 Minimum insertion line (100mm)
11 Arm - ST (4)
12 Pivot washer (8)
13 Elastomer - ST
14 Arm bolt, 16mm (4)
Minimum Elastomer
Recommendation
extra soft - #1*
soft - #3
medium - #5
hard - #7
Exceeds post limit