Elite
,
Elite
and
BMX
Elite
,
Elite
and
BMX
L.H. Thomson Co. Inc. 7800 N.E. Industrial Blvd.
Macon, Georgia USA 31216-7748
phone: 478.788.5052
email: [email protected]
www.bikethomson.com
Carbon Fiber and Aluminum Steerers
Congratulations!
THANK YOU for purchasing the Thomson Stem. The following instructions
should be read completely before installation. If you have any questions
regarding installation or service of this product, please contact your local
dealer. We recommend that a professional bicycle mechanic install and
service this product.
Before starting assembly
Carbon,
Aluminum
or Steel
Steerer Tube
Grease all of the bolt threads and the threads inside the stem
before assembly. All bolts are identical.
Important: For carbon fiber steerer tubes refer to the manu-
facturer specifications on how to cut and finish the steerer
tube.
Important: For carbon
fiber steerer tubes refer
to the manufacturer
specifications on how
to cut and finish the
steerer tube.
Using a torque wrench,
alternate tightening
each bolt in small
amounts until both are
tightened to 5.5 Nm
Make sure there is an
equal gap between the
handlebar clamp and the
stem body. Using a torque
wrench, tighten the four
bar clamp bolts to 4.0 Nm
Make sure there is an
equal gap between the
handlebar clamp and the
stem body. Using a torque
wrench, tighten the four
bar clamp bolts to 5.1 Nm
Using a torque wrench,
alternate tightening each
bolt in small amounts until
both bolts are tightened
to 12.4 Nm
Tightening Process for
and
Steerer Clamp Bolts
Tightening Process for
Bar Clamp Bolts
Tightening Process for
Bar Clamp Bolts
Tightening Process for BMX Stem Bolts
Torque Pattern for Tightening BMX Stem
Bolts
For steel and aluminum steerer tubes: Remove any burrs from the
steerer tube; do not remove any base metal. File a smooth radius
around the top edge as shown. If the Thomson Stem has a burr at the
point of contact with the steerer tube, handlebar, or clamp, remove the
burr with 400 grit sandpaper.
Steerer tube
Smooth finish
Make sure there are no burrs.
Degrease the steerer
tube, the inside of the
Thomson Stem and the
steerer clamps before
assembly. Rubbing
alcohol is an effective
degreaser.
Before riding, check
that the stem is tight
and properly installed.
Pinch the front wheel of
the bike between your
knees and attempt to
rotate the bars. The
bars should not twist.
This should be done
before every bike ride.
After installing the stem, check
that the cable housings do
not bind. Check by turning the
handlebar until the grip hits the
frame. If the housings bind,
replace with longer ones.
Tighten handlebar clamp using numbered
torque pattern. Make sure bolts are tight-
ened to 12.4 Nm
Grease
Grease
Grease
Grease
Degrease
Equal gap
Equal gap
Equal gap
Equal gap
does not bind
Steerer should extend 3mm
above stem requiring a 5mm
spacer.
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U.S. Patents 6,309,135; 6,945,135; 7,407,176; 7,500,415; 5,123,485 S; 515,983 S; 515,4983 S; 516,965 S; 528,047
E.U. Patents 1,210,261 EP; 021,083,488 PCT; 1,595,778 EP
