The head: Low profile rail clamps with shorter bolts improves clearance for the riders legs. Forged & CNC machined from 6061 aluminum, the seatpost head is incredibly strong & fatigue resistant. Patented head design is lightweight & distributes loads more efficiently than conventional seatpost head designs. Offers unprecedented adjustability - with infinite tilt adjustment completely independent from the fore/aft adjustment. Side clamping rail system distributes loads to the clamp, rather than the bolt, virtually eliminating the possibility of broken bolts. The head accommodates 7mm & 8mm rails while providing 35mm of rail support. Features a 0.5 Inch rearward offset. The tube: The seatpost tube is manufactured from 7050 heat-treated aluminum for optimal strength to weight ratio. Race Face's triple butting design maintains strength in critical areas while reducing overall weight. The tube is anodized & shot peened for increased fatigue life.