Thomson Seatclamp

You need to measure the outside diameter of your frame's seat tube, not the diameter of the seatpost itself. A 28.6mm clamp is designed specifically for frames with a 28.6mm seat tube outer diameter, which is a common size for steel road and mountain bike frames.

While the clamp is made of high-quality aluminum, you should always check your frame manufacturer's specifications first. Some carbon frames require specific torque settings or proprietary clamps, so verify that a standard 28.6mm collar is compatible with your specific frame design.

No, this is a bolt-on seatpost clamp. It is designed to be tightened with a hex key, which provides a cleaner, more secure, and more permanent fit than a quick-release mechanism.

Thomson's anodized finish is highly durable and resistant to corrosion and typical wear. However, like any metal component, it can be scratched by metal tools if you are not careful during installation or adjustment.

You will need a standard hex key (Allen wrench) to tighten the bolt. Ensure you use the correct size key to avoid stripping the bolt head, and consider using a torque wrench if you want to be precise with your clamping force.