Bred for speed, HSG Carbon boasts TC2 tubing, new geometry and a hot new look for the 2008 season. Using Serotta's proprietary US-made carbon fiber tube and multi-modulus lug (MML) design, HSG Carbon is the lightest, stiffest and most race-worthy Serotta ever. Torsion Core™ technology enhances acceleration while providing excellent vibration damping and vertical compliance. For strength and durability, we've reinforced the bottom bracket and headset sleeves with titanium, making this bike the ultimate all-round winner for the competitive cyclist.