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Seatpost Shim Adaptor 31.6 to 34.9 27.2 to 31.6 27.2 to 30.9

Ascend Components Seatpost Shim Adaptor

Fine-tune your ride with the Ascend Components Seatpost Shim Adaptor, the perfect solution for adapting your seatpost to fit securely into your bike’s seat tube. Whether you're swapping components or upgrading your frame, this shim ensures a snug, stable fit without compromising performance.

Crafted from high-grade AL-6061T6 aluminum, our shim adaptors are CNC-machined for exact tolerances and long-lasting durability. Unlike many standard shims on the market, the Ascend Seatpost Shim is designed longer at 100mm, offering enhanced contact area and improved support—especially important for maintaining frame integrity and minimising flex during aggressive rides.

Whether you're a trail rider, commuter, or gravel adventurer, you can count on a seamless installation and a secure hold, every time.

Key Features:

Genuine Ascend Components spare parts- built to the same standards as all Ascend products
Precision CNC Machined from AL6061 Aluminium with T6 heat treatment
Extended 100MM length- more surface area in contact with your seattube
Quick and easy installation- no special tools required - just slot in to your seat tube.
Perfect for multiple seatpost/ frame combinations- ideal for adapting between common diameter differences.