RaceFace Turbine Mountain Bike Seatpost Weight: 250g (309mm) Low profile rail clamps with shorter bolts improves clearance for the riders legs Forged and CNC machined from 6061 aluminum, the seatpost head is incredibly strong and fatigue resistant Patented head design is lightweight and distributes loads more efficiently than conventional seatpost head designs Offers unprecedented adjustability-with infinite tilt adjustment completely independent from the fore/aft adjustment