Ritchey WCS C260 Road/Mountain Bicycle Stem Material: 3D forged and internally machined 2014 alloy body 3 x M4 steer tube bolts and curved clamp slot reduces weight and steer tube stress 5Nm torque max on all hardward, same as 4-Axis stems using M5 bolts Installs without the removal of levers Fits most road and mountain bars