WARNING:
Cane Creek threadless headsets are designed for use with unthreaded, full-thickness bicycle fork steerer tubes. Use of
this headset with a threaded steerer tube or a steerer tube with a reduced wall thickness can result in cracking or breaking of the
steerer tube, causing damage to the bicycle and possible injury or death to the rider.
A) Preparing Frame and Fork for Headset Installation:
1. Use a head tube reaming and facing tool to prepare the top and bottom of the frame’s head tube.
(Be sure to use the correct reamer diameter corresponding to the headset being installed.)
2. Use a crown race cutting tool to turn and face the crown race seat of the fork. (Be sure to use the
correct cutter diameter corresponding to the headset being installed.)
NOTE:
It is imperative to complete these steps to ensure a smooth operating headset. If these steps are
not completed or done improperly, the headset may be more rough in turning or may tend to “stick” to one
side or the other. This applies to ALL frames and forks, new or used, painted or unpainted.
B) Determining Required Fork Steerer Tube Length:
There are 2 possible methods for determining the required fork steerer tube length:
i) Calculation Method:
1. Determine the headset stack height by adding the following
measurements (illustration to left).
A) Bottom of the large diameter portion of the upper cup to
the outer top of the upper bearing cover (including
Interlok spacers.
B) Crown race bottom to the top of the large diameter portion
of the lower cup.
2. Measure the head tube length.
3. Measure the total height of Interlok spacers desired.
4. Measure the height of the clamp portion of the handlebar stem.
5. Add the above dimensions and subtract 3 mm for adjustment
clearance
Required fork steerer tube length
= headset stack head tube
total height of Interlok s stem clamp height - 3 mm
ii) Assembly Method (preferred):
1. Install the bearing cups as instructed in step
D
.
2. Install the crown race as instructed in step
E
.
3. Assemble the headset as instructed in step
G
.
4. Tighten 1 stem clamp bolt enough to hold the assembly in place.
5. Mark the steerer tube at the top of the stem.
6. Disassemble the stem, Interlok spacers, upper bearing cover and bearings.
7. The
required fork steerer tube length
will be 3 mm below the marking from step 5.
C) Cutting Fork Steerer Tube:
1. Carefully cut the fork steerer tube in the correct location, as determined from step
B
, using a
tubing cutter, hacksaw or other appropriate cutting tool.
2. Use a file to remove any burrs from the area of the cut to prevent damage to the upper bearing
cover o-ring.
D) Installing Upper and Lower Bearing Cups:
Press the upper and lower bearing cups (without bearings installed) into the head tube using a good
quality headset press. It is important to press on the flat inside surface only, to prevent damage to
the bearing cups. Use correctly sized headset press tool inserts if necessary.
E) Installing Crown Race:
Press the fork crown race onto the fork with an appropriate crown race installation tool until the flat
back face is flush against the fork crown. Do not press against the tapered portion of the crown race.
S2/S6 Headset
Instructions
1
2
3
4
5
6
7
8
9
10
11
Adjusting Bolt
Top Cap
Star Nut
Interlok Spacer (top) 3mm
Interlok Spacer 5mm
Upper Cover
Compression Ring
Bearing
Upper Cup
Lower Cup
Crown Race
1
2
3
4
6
5
7
9
10
11
8
8
