Due to the use of stronger materials, the seat tube is slightly heavier. The weights are: Φ27.2mm – 1.87lbs, Φ30.9mm – 2.03lbs, and Φ31.6mm – 2.07lbs. If your current seatpost size is not available in our options, we recommend choosing the 27.2mm diameter along with a suitable shim for proper installation. Weight, 1.87lbs(27.2MM), 2.03lbs(30.9MM), 2.07lbs(31.6MM) ; Material, Aluminum Alloy ; Total Length, 13.77inch ; Travel, 1.9inch ; For, MTB/Cruiser Bike/Gravel... Before purchasing, please note the seat tube weight if it’s important to you. [Enhanced Riding Experience] The 50mm suspension travel provides smooth performance across all terrains, ensuring a more enjoyable and comfortable ride. SR Suntour SP12 NCX Suspension tige de selle Togo Full Suspension Ebike Suspension Seatpost 27.2 30.4 30.9 31.6 Bike Seat Botswana Bike Seat Shock Absorber [Effortless Adjustment] Easily fine-tune the suspension damping with a 6mm hex key for a personalized, smooth riding experience. Universal Air Conditioner® FT7609AC - A/C Refrigerant Hose Fitting [Important Notice: Please Check Before Purchase] Ensure the seatpost diameter you select matches your bike’s existing seatpost for full compatibility.