Cervelo ST31 Carbon Stem / ST-C031

Several of Cervelo's frameset models (Caledonia-5, Aspero-5, and 2022 R5) have a proprietary C-shaped steerer tube that require a matching stem design, and the company offers this ST31 Carbon version, as well as the ST32 Alloy option. The stout but reasonably light design is otherwise a threadless stem in how it sets up and functions, with the steerer via a split spacer system and a 2-bolt steerer clamp. It carries a 4-bolt faceplate for a 31.8mm diameter handlebar.

The ST31 Stem features access for internal routing and has a rear facing section with a mild aero taper to match the specified fork/framesets. Cervelo offers the ST31 in 70-130 mm lengths in a -9 degree drop.

• Carbon threadless stem designed for proprietary C-shape steerer tube used on Cervelo Caledonia-5, Aspero-5,and 2022 R5
• 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
• Angle: 81° (-9°)
• Lengths: 70, 80, 90, 100, 110, 120, 130 mm (if not listed, please contact us for availability)
• Finish: Satin Carbon
• Weight: 210 grams (100mm)

Note: For Cervelo's C-shaped fork steerer only (Aspero-5, Caledonia-5, 2022 R5)