Q - My Thomson Seatpost hits my rear suspension. Can I cut the end of the seatpost off? How should I cut it? A - Warning: Once a seatpost has been cut off, the Max Line is No Longer Valid! This can lead to dangerous situations where the seatpost is not inserted into the frame far enough. Damage to the bicycle, seatpost, and/or injury to the rider could result.
The Thomson seatpost in available in three lengths. If at all possible, we recommend using a seatpost that is correct fit for your bike. We do not recommend cutting the seatpost. However, we realize that some people will cut off their seatpost no matter what we recommend.
The best way to cut off a seatpost is to use the Park threadless fork saw guide (SG-6
www.parktool.com/tools/SG 6.shtml) and a hacksaw. Determine the length and line up the cut with the guide. Place the guide in a vice and cut the seatpost. Any bike shop should have the Park threadless for saw guide. If you do not have access to this tool then the next best way to cut the post is with a hacksaw and vice. Care must be taken when holding the seatpost in a vice. If at all possible, clamp the vice on the section of the post that is to be cut off. Try not to clamp the vice too tightly. Do not clamp on the thin walls of the seatpost.
We do not recommend using a pipe cutter. Pipe cutters mar the finish, and are difficult to use on the Thomson seatpost.
Be sure to round the corner where the seatpost has been cut using a file or a deburring tool. Mark a new max line on your seatpost that is as far away from the end of your post as the old max line used to be.
If the seatpost has been modified, the warranty is at our discretion.
