If you’re looking to shave grams without sacrificing strength or control, the Thor Carbon Single Bolt Seatpost (2025 model) is the upgrade your bike deserves. Designed for serious cyclists who demand a clean, minimalist look combined with top-tier performance, this carbon seatpost delivers where it counts—on the road, on gravel, or in the dirt.

Incredibly lightweight with uncompromising strength

Built from high-modulus Toray carbon, this seatpost is engineered to keep your ride light and responsive. Whether you’re climbing steep grades or hammering it out on the flats, you’ll feel the benefit of every gram saved. Despite its minimal weight, this post passes all critical ISO 4210 fatigue and safety tests—so you can ride hard, worry-free.

Easy saddle adjustment thanks to the single-bolt head

Say goodbye to awkward saddle tweaks. The clever single-bolt design makes angle and position adjustment straightforward and tool-friendly. With a sleek clamping mechanism that keeps everything secure and dialed in, you’ll spend less time in the garage and more time in the saddle.

Three diameter options to match your setup

Whether you're running a classic 27.2 mm, the less common 30.9 mm, or the ever-popular 31.6 mm, Thor has you covered. Straight or with 20 mm setback, this post is made to match the geometry and fit preferences of modern frames. Its carefully engineered layup ensures stiffness and compliance right where you need it.

Ready for both round and oval saddle rails

Each seatpost comes with interchangeable rail clamps, making it compatible with both 7x7 mm round rails and 7x9 mm oval rails. No hassle, no adapters, no limits—just the freedom to use the saddle you want. And if you're running a Shimano Di2 setup, this post is fully ready to host your internal battery.

Matte black finish with subtle glossy details

The aesthetics are just as refined as the engineering. With a matte carbon finish and understated glossy THOR branding, this seatpost doesn’t scream for attention—it earns it. It blends seamlessly into both stealthy and bold builds, completing the look of any high-end bike.

Designed by riders, for riders

After over a year of development, this seatpost reflects Thor Carbon’s deep commitment to performance, simplicity, and function. Whether you’re chasing KOMs, leading a group ride, or dialing in your dream build, this seatpost is made to keep up—and stand out.

Upgrade your ride with a post that’s as sharp as your ambition. Light, strong, and effortlessly stylish, the Thor Single Bolt Zadelpen is a perfect match for riders who want precision and power in every detail. Once it’s on your bike, you’ll wonder why you ever rode without it.