Cervelo ST32 StemSeveral 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 ST32 Alloy version, as well as the ST31 Carbon 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. A 4 bolt faceplate fastens a 31. 8mm diameter