Specialized STC Seatpost Clamp

This clamp has an inner diameter of 30.8mm. You must measure your frame's seat tube outer diameter or check your bike manufacturer's specifications to ensure compatibility, as seat tube sizes vary significantly between models.

A bolt-on clamp provides a more secure, permanent hold and is generally lighter than quick-release options. It is the preferred choice for riders who do not need to adjust their saddle height frequently during a ride.

The maximum torque for this clamp is 6.2 Nm. We recommend using a calibrated torque wrench during installation to ensure the bolt is tightened correctly without damaging the clamp or your seatpost.

Yes, you can use this with a carbon seatpost, provided you adhere to the 6.2 Nm torque limit. It is also highly recommended to apply a small amount of carbon assembly paste to the seatpost to ensure a secure grip without needing to over-tighten the bolt.

While the steel bolt is durable, it is good practice to occasionally check that it remains tight and free of debris. If you ride in wet or muddy conditions, applying a tiny amount of grease to the bolt threads can help prevent seizing over time.