Ritchey RL-1 4-Axis Stem – 31.8mm Clamp 100mm Black. With its unique faceplate design the Ritchey 4-Axis stem was a game-changer when it was first released many years ago. Today the OE 4-Axis-44 stem offers a wider 44mm faceplate and continues to offer world-class performance and unparalleled reliability thats unmatched at a similar price-point.