Ritchey WCS C220 Stem - 60mm, 31.8 Clamp, +/-6, 1 1/8", Aluminum, BlatteThe the WCS C220 stem rivals the performance of the revolutionary C260 stem design, but it's quicker and easier to install or remove thanks to a press fit handlebar clamp interface and forward facing hardware. The handlebar clamp design creates a more secure interface by wrapping a full 220 degrees over the handlebar Bolt forces are aligned with the clamp so that the stem body embraces the handlebar which is less prone to damaging lightweight bars