Ritchey WCS C260 White StemAt 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.
Lightest stem that I could find on the market. 3-bolt clamping is great, no creaks or loosening.