Ritchey Superlogic C260 Carbon Mountain/Road Bicycle Stem C260 bar clamp creates a larger stem-to-bar interface, drastically reducing bolt stress 4 x M4 faceplate bolts and patented 260 degree bar clamp design reduces weight, increases stiffness 3 x M4 steer tube bolts and curved clamp slot reduces weight and steer tube stress 5Nm torque max on all hardware, same as 4Axis stems using M5 bolts 84/6 degree angle, Fits most road and mountain bars, 125g (110mm)