Upgrade your mountain bike with this Fox Transfer Factory Dropper Seatpost. The gold-colored seatpost has a diameter of 30.9mm and is compatible with various mountain bikes. The adjustable seatpost type ensures a comfortable ride for all terrains and is perfect for those who enjoy cycling sports. The set includes the seatpost itself, and it is a great addition to any bike enthusiast's collection. This dropper post has been used for about three years and is still in excellent condition; it even includes the box!.