G.Shim Reducing Sleeve

Introduction

Experience the simple solution for mismatched frame seat tube and seat post diameters with the G.Shim Reducing Sleeve by by,schulz. Designed from precision-engineered anodized AL-6061-T6 aluminum, this adapter is an indispensable component for cyclists, bike fitters, and shops seeking a secure, wobble-free seat post fit. Its advanced construction ensures even clamping, durability, and zero-movement stability—making it ideal for bike upgrades, replacements, or routine maintenance.

Key Features

• Crafted from high-quality anodized AL-6061-T6 aluminum for lightweight strength and corrosion resistance

• Innovative double-slotted shape for even force distribution and maximum seating security

• Multiple diameter options for a wide range of frame and seat post combinations—including popular 34.9mm to 31.6mm reductions

• Extended 120mm length provides generous coverage and firm support within the frame

• Remains securely inside the seat tube during adjustments and seat post removal thanks to a precise preload fit

Benefits

• Effortlessly solves compatibility issues between frame seat tubes and seat posts, making upgrades and sizing changes simple

• Eliminates seat post wobble and instability, offering a safer, smoother ride

• Minimal added weight (from just 45g) preserves the bike’s performance and handling

• Straightforward installation for both professionals and DIY cyclists, requiring only basic tools

How to Use

1. Preparation
   Ensure the frame seat tube and seat post are clean and free of dust or debris.

2. Positioning
   Select the correct G.Shim variant. Insert the sleeve vertically into the seat tube, aligning the slots with the frame’s slot for even clamping.

3. Usage
   Slide your seat post into the sleeve, adjust to the preferred height, and fasten the seat clamp as usual. The G.Shim ensures the perfect snug fit.

4. Storage
   The G.Shim stays firmly in the frame even when the seat post is removed, so you’re ready for future adjustments without hassle.

Conclusion

Upgrade your bicycle’s compatibility and comfort with the by,schulz G.Shim Reducing Sleeve. Its premium materials, thoughtful engineering, and effortless use make it the top solution for cyclists seeking reliability and versatility. Enjoy a rattle-free, perfectly secured seat post every time—choose G.Shim and ride with confidence.