Elite
Elite
,
Before starting assembly
1
Carbon Fiber and Aluminum Steerers
Steerer should extend 3mm above stem requiring
a 5mm spacer.
Important: For carbon fiber steerer tubes, refer
to the manufacturer specifications on how to cut
and finish the steerer tube.
2
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
Grease all of the bolt threads and the threads inside the stem before assembly.
3
All bolts are identical.
Grease
Grease
BMX
Grease
Degrease the steerer tube, the inside of the Thomson Stem and the steerer clamps before
4
assembly. Rubbing alcohol is an effective degreaser.
Degrease
5
Tighten headset to the headset manufacturer's torque specification.
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
BMX STEM
, AND
Carbon,
Aluminum or
Steel
Steerer Tube
Make sure there are no burrs.
Both
Grease
IMPORTANT: Recheck the torque on the stem
bolts and headset preload after the first couple rides.
The headset bearings are likely to seat-in and need
readjusting.
Elite
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.
L.H. Thomson Co. Inc. 7800 N.E. Industrial Blvd.
Macon, Georgia USA 31216-7748
phone: 478.788.5052
www.bikethomson.com
6
Tightening Process for
Using a torque wrench, alternate
tightening each bolt in small amounts
until both are tightened to 5.5 Nm
7
Tightening Process for Bar Clamp Bolts
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
Tightening Process for
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
Grease
BMX
Tightening Process for BMX Stem Bolts
Using a torque wrench,
alternate tightening each bolt in
small amounts until both bolts are
tightened
to 12.4 Nm
Degrease
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.
Elite
BMX STEM
,
, AND
Congratulations!
and
Steerer Clamp Bolts
Bar Clamp Bolts
Torque Pattern for Tightening BMX Stem Bolts
Tighten handlebar clamp using numbered torque pattern.
Make sure bolts are tightened to 12.4 Nm
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.
Equal gap
Equal gap
Equal gap
Equal gap
does not bind