Ritchey WCS C260 3D forged and internally machined 7050 alloy body 30% stiffer than Ritchey's legendary WCS 4-Axis stem, and 20 grams lighter 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 103 grams