SDG I-Beam Aluminum Seatposts. I-Beam technology eliminates seat rails for a single beam incoporated into the saddle shell. I-Beam provides the widest range of fore and aft adjustments available and uses simple 1-bolt clamp.
Uses a single, easy-access 6mm bolt for quick and simple adjustments or saddle changes
6061 cold forged aluminum head and clamps with 2014 aluminum tube