This is the Evolution of the Elementary stem by Odyssey that uses 1 bolt to actuate 4 wedge pieces clamping the steerer tube and the bars simultaneously. It's SIC. Tongue and groove wedges ease assembly and increase rigidity while helicoiled threads in the side wedge reduce the chances of stripping. 1-1/8" This unique design is not only one of the most functional designs I have seen, but also sexy. I love this goose neck. Testing it myself at the Clairemont BMX Park, it has been proven!
Weight: 8.2 oz
Around $65 clams...