Ritchey WCS C260 Matrix Revolutionary C260 3D forged 7050 alloy with Matrix structural carbon exoskeleton to enhance stiffness 14% stiffer than the WCS alloy C260 version 4 x M4 faceplate bolts and patented 260 degree bar clamp design reduces weight , increases stiffness, and distributes stress more evenly 3 x M4 steerer tube bolts and curved clamp slot reduces weight and steerer tube stress Fits most road and mountain bars 42mm stack height 113 grams