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
All new Thomson Seatposts come with a 12° top clamp. The clamp usually works best with the word “FRONT” facing the front of
the bike. If the nose of the seat will not tilt up enough (very rare) turn the clamp around for extra adjustment.
1
2
3
4
Assembly
5
6
7
8
9
Front Towards
Front of Bike
FRONT
4123
29
Positive Stop
R
R
Do Not Tighten Hard Against Stop
Rear Bolt Must be
Tight Against Front Bolt
R
Seatpost
Clamp
Bicycle Seat Tube
Must Have Gap
Gap
Congratulations!
THANK YOU for purchasing the Thomson Seatpost. 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.
Angle head of seatpost down and pull top clamp away from bottom – still holding bottom clamp up against seatpost head.
Work the top clamp onto the seat rails at the back of the seat, and then slide into position.
PLEASE NOTE:
Disassemble top clamp completely before
installing onto carbon rails
PLEASE NOTE:
The only piece of the assembly that could cause damage
by being assembled improperly is the spherical washer. The
spherical seat in the washer must face the spherical seat
underneath the head of the bolt.
See diagram at left for correct installation.
Adjust angle of seat by tightening one spherical bolt and loosening the other. Slide seat to desired fore, aft position.
Use 4mm allen wrench and tighten bolts to proper torque.
Elite – 6.8 Nm
Masterpiece 5.1 Nm
Grease only bolt threads. Do not grease under bolt head
or washer and do not use anti-seize.
All Thomson Seatposts are designed with positive metal to metal stops. These positive stops and bolt lengths are designed to work
together to allow a maximum 5° up tilt and 29° down tilt.
This means the tilt adjustment of the clamps will be stopped by the positive stop before the back bolt runs out of the nut. This
prevents damage to bolts, nuts, ears, and clamps that may otherwise occur with over adjustment.
DO NOT replace the stock bolt with a longer bolt. A longer bolt will not allow more tilt.
Never tighten the front bolt hard against the positive stop.
Make sure that the bolts are tightened against each other. Always tighten the back bolt to
6.8 Nm of torque.
For the Masterpiece, always tighten the back bolt to no more than
5.1 Nm.
If the front bolt is tightened hard against the front ear, the force created by that tightening will be subtracted from the bolt’s avail-
able force to withstand high impact loads. If the front bolt is tightened hard against the stop and not against the rear bolt, the rear
bolt could loosen during impact loads.
During insertion and tightening, make sure that the clamp lip located at the top of the bicycle’s seat tube does not touch the sides
of the seatpost tube. Only the bicycle seat tube should touch the seatpost tube.
If the clamp lip does touch the seatpost at any time during tightening, do not continue to tighten. If contact occurs, either remove
material from the bicycle seatpost clamp, or replace it with a clamp that will allow clearance.
On some bicycle frames the seat tube extends long above the tube. Make sure you
insert the Thomson Seatpost so that it sinks below the frame’s top tube.
The Thomson Seatpost is perfectly safe to run at its max line in any frame. However,
please be warned that if the seatpost is not sunk below the top tube of the frame,
there is a risk of damaging the bicycle frame.
US patents 5,649,738; 5,664,829; 413,284; 407,998; 451,847
EU patents 0842083D1 EP; 6967174.6-8 Germ
