At 103 grams this is lightest most advanced alloy stem in the ritchey line and possibly the world this revolutionary patented design starts with a bar clamp that wraps a full 260 degrees around the handlebar to distribute clamping stress more evenly through the handlebar faceplate hardware and stem body the steer tube clamp uses three bolts and a curved slot to reduce clamp stress on the steer tube the body is 3d forged from an advanced 7050 aluminum and internally machined for further