Seatpost collars are the little strongmen of bike components. Weighing only a few grams yet capable of holding a riders body weight over all types of terrain. Seat post collars clamp your seat post into your frame securely with either a hex bolt or quick release lever. They come in a variety of sizes, make sure you measure your frame’s seat tube diameter to get the correct size. Merlin stock seat post collars from the World’s leading manufacturers including BBB, Hope and Thomson.