RUJOI Bike Seat Posts,Bike Adjustable Suspension Seatpost 27.2mm 31.6mm Alumium Seatpost for MTB Road Bike,Quick Release seatpost clamp Included - RST0030

• Spring Coil Suspension Comfortable :Build-in spring coil inside to absorb the vibration and shocks while riding, refound force and hardness can be adjustable by bottom screw depend on versiabily . It will comfort your riding experience on long cycling .and improve your riding experience. Adjustable Saddle clamp angle : It can adjust between -5 degree to +18 degree.With 2 bolts hold the clamp, enhance safe and easy to install. Superior quality: Made with Aluminum 6061 by Famous Taiwan supplier ,meet with safety standard ISO 4210. All Seat Post bundled with Quick Release Bicycle Seatpost Clamp : the 27.2 mm bundle with 31.8mm ,and 31.8 bundle with 34.9mm ,The material made by 6061-Au for you to quickly adjust the seat post height and take off easily and quickly. Note: Choose Correct Diameter Size is important .Wrong size will not fit your seat tube .A:Take out your current seatpost, the diameter marked on it’s lower area. If it didn't show on it ,then measure your bike seat tube correctly