Alloy threadless stem designed for proprietary C-shape steerer tube used on Cervelo Caledonia-5, Aspero-5,and 2022 R5 FEATURES: Slightly aero rear shape to match the frame design Standard 2-bolt steer clamp, 4-bolt 31.8mm handlebar clamp Must be used with specific split spacer system (Cervelo SK-023) Designed for internal routing SPECS: Angle: -9° Finish: Satin Black with dark grey stripe Weight: 210 grams (100mm)