★How To Choose Correct Diameter Size★ : (1) Check The Original Seatpost Size Marked On The Body ,Choose The Same Size As The Original One.(2) Measure The Inside Diameter Of The Frame Tube(Normally It Is Not Accurate, Considering Operator,Measuring Tool , Temperature,Etc.,).(3) Inquire The Bike Frame Seller To Get The Further Information
★How To Adjust And Install Suspension★ : Rebound Force Adjustable By Tighten Or Loose The Bottom Screw Wiht M6 Allen Wrench. Suspension Travel 42mm/ 1.65inch.Build-In Spring Coil And Damper Rubber Absorb The Vibration While Riding, The Seat Post Comfort Your Riding Experience, Improve The Shocks. Saddle Clamp Angle Can Adjust In -5 Degree To +18 Degree. 2 Bolts Hold The Clamp, Enhance Safe And Easy To Install
★Seat Tube Parameters★ :Material: 6061-T6 Alloy Aluminum , Diameter : 27.2mm Length: 350mm Travel: 40mm Adjustable Preload Suspension Travel. Offset :14mm .Weight: Approx 490g(1.08 Lbs) Damping:Coil Spring , You Can Add Seatpost Thim(27.2~28.6/30.0/30.4/30.8/30.9/31.6/33.9) To Fit Different Size
★Compatibility★ : Most Fixed Gear Bike ,Road Bike ,Mountain Bike , Universal Bikes,Etc. Support Weight 50kg/ 110lbs To 100kg/ 220lbs(Clockwise The Bottom Screw If You Are Heavy, Anticlockwise It If You Are Lightweight)
★Warranty:★ :We Are Confident To The Product Quality And Offer 2 Years Warranty.And If There Are Any Questions, You Can Contact Us Firstly On Amazon, We Will Serve You And Satisfy You