Surly Seatpost Clamp

You need to match the clamp size to your bike frame's seat tube outer diameter, not the seatpost diameter itself. This clamp is available in 30.0 mm and 33.1 mm sizes, so check your frame manufacturer's specifications or use digital calipers to measure the outside of your seat tube before ordering.

Yes. Because it is constructed from high-quality stainless steel, it is naturally resistant to rust and corrosion, making it an excellent choice for year-round commuters or riders who frequently encounter mud, rain, or road salt.

While the stainless steel construction is durable, you should always use a carbon-safe assembly paste when installing any clamp on a carbon seatpost. This ensures a secure hold without needing to overtighten the bolt, which could damage the carbon structure.

This model features a bolt-on design. This provides a more secure, permanent hold that is less prone to theft and mechanical failure compared to quick-release levers, which is ideal for long-term reliability.