Kalloy XTB-N Seat Clamp

You need to match the clamp diameter to the outer diameter of your bike's seat tube, not the seatpost itself. You can usually find this measurement etched onto your current seat clamp or by measuring the seat tube with a set of calipers.

This clamp is designed primarily for metal frames. If you are using a carbon seatpost, we recommend using a standard bolt-on clamp instead, as quick-release levers can sometimes apply uneven pressure that may damage delicate carbon surfaces.

The stack height is 15mm, which refers to the vertical space the clamp occupies on your seat tube. Ensure you have at least 15mm of clear, unobstructed seat tube space available to accommodate the clamp.

Yes, the forged construction provides a very secure hold. However, because it is a quick-release mechanism, it is best suited for commuting, touring, or casual trail riding rather than extreme downhill or high-impact mountain biking where a bolt-on clamp is preferred for maximum security.

Anodizing is a durable, corrosion-resistant finish that holds up well to the elements. While it is significantly more resilient than paint, it may show minor signs of wear or fading if your bike is stored in direct, harsh sunlight for extended periods.