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Thomson Seatpost Clamp

Item #: SE298F00
USD$39.95
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Thomson Seatpost Clamp

Thomson Seatpost Clamp


Great looks, great clamping, long life and no squeaking.  The perfect addition to your Thomson Cockpit.

The Thomson Seatpost Collar has several features that make it distinct. The collar utilizes the Thomson Seatpost bolt, washer and barrel nut combination that has proven to be strong over the years. This fastener combination allows float on both sides of the collar slot ensuring consistent clamping force. The bolt hole angle, height of the collar and offset slot all help create a collar that generates maximum clamping force at only 25 inch pounds of fastener torque. We recommend them for use with dropper seatposts for this very reason, as minimal clamp torque will prolong the service life of a dropper seatpost.
  • Approximate weight 26 grams
  • Made in the USA
  • 12mm tall

5.0 / 5.0
13 Reviews
5 Stars
4 Stars
3 Stars
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Great Clamp
The Bontrager QR clamp could never tighten down enough to keep the seat post on my hard tail from slipping during a ride. I even used an allen wrench to provide as much pre-tension as possible and it still slipped. I replaced it with the Thompson camp and the post has not slipped since. Now I can concentrate on riding instead of being frustrated by the constantly changing seat position.

Since it's not a QR, it's not as convenient to adjust the seat height. I just carry a second 5mm allen key.

PROS: Lightweight, Great Mounting System, Attractive Design, Strong Construction

BEST USES: Upgrade, Mountain Biking
November 27, 2013
Location:
Orange County, CA
Very nice seat post clamp
This seat post clamp is typical of Thomson quality (very high). It fits well, and does it's job well - so far I haven't noted any seat post movement through a few bumpy rides. They provide clear instructions including where and what to grease (or not), how much torque to apply, and how to orientate the clamp based on your frame and the seat post you are using. This is something that was very useful to me as new upgrader ("which was does this go???") :)

PROS: Lightweight, Attractive Design, Strong Construction, Good Instructions, Low Torque Required, Great Mounting System

BEST USES: Upgrade, Mountain Biking
August 31, 2015
Location:
North Carolina
Simple, well engineered component
I needed a better clamp to prevent slipping in my carbon frame. And it does the job that others can't.
A bit more than what you think you should spend, but with the brass hardware, and well engineered and machined design, it is worth the extra dough.
Great upgrade.

PROS: Attractive Design, Brass Hardware, Strong Construction, Great Mounting System

BEST USES: Mountain Biking, Upgrade
July 31, 2014
Location:
Canada
No slipping
Never had my seatpost slippage using this. Seems to distribute clamping load evenly.

PROS: Strong, No slipping, Made in USA
March 2, 2012
Location:
Berkeley
Great clamp!!
I love this clamp! Thomson product are very high quality. Lightweight and durable. You can't go wrong.

PROS: American Made, Durable, Lightweight, Stylish

CONS: none
February 23, 2012
Location:
Huntington Beach, CA
looks good and does what it's meant to
You've got to love the quality of Thomson's products. The seat clamp looks good, holds the seatpost securely and only needs tightening to ~3nm.
I have these clamps on steel, aluminim, Ti and carbon frames because they just work.
January 13, 2017
Purchased
1 year ago
Location:
SF Bay Area
Cool clamp
Great complimant to my Thomson seatpost

PROS: Lightweight, Great Mounting System, Strong Construction, Attractive Design

BEST USES: Upgrade, Mountain Biking
March 17, 2016
Location:
Morton, IL
True , use torx recommendation
Liked enough to purchase a second one. Follow the torc guideline.

PROS: Attractive Design, Great Mounting System, Lightweight, Don't Over Tighen

CONS: Keep The Gorilla Caged

BEST USES: Mountain Biking, Does A Great Job Clean
March 15, 2015
Location:
Great state of tx
One clamp to rule them all!
Stop searching. Look no further. You've travelled through Middle Earth searching for the perfect seatpost clamp - and now it's within your reach!

Looks amazing, works perfectly. I can't think of any other clamp I'd rather run on my bikes. Unless I needed to mount a rear rack or re-route and external dropper postcable. Then I'd get one of those fancy Problem Solvers one. But this one is cooler.

PROS: Attractive Design, Stylish Aesthetics, Great Mounting System, Strong Construction

CONS: Might Look Too Good

BEST USES: Mountain Biking, Upgrade
March 16, 2015
Location:
Melbourne, Australia
the final bit of bling
This has lower bolt torque and a taller clamping area that is perfect for my dropper post. The offset opening and the barrel bolt combo spread the clamping load so well its good for carbon too. The price might seem steep but this is a "forever" part so quality matters most.

PROS: Strong Construction, Great Mounting System, Attractive Design, Lightweight, Lower Bolt Torque

BEST USES: Mountain Biking, Road Biking, Upgrade, BMX
February 26, 2016
Location:
Pluto

Q & A

Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 1 question Browse 1 question and 2 answers
I have a 27.2 slk seatpost which diameter fits?
A shopper on Jul 29, 2017
BEST ANSWER: If you have a steel frame, 28.6
If it's an aluminium or carbon frame, 31.8

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.