Certified Refurbished & Pre-Owned Deals Outlet Deals Like New Tuttio ICT EbikeCervelo ST31 Stem

The Cervelo ST31 Stem was designed with a specific set of bikes in mind — and that intentionality shows in how cleanly it integrates. Built from carbon fiber for a high stiffness-to-weight ratio, the ST31 pairs an aerodynamic profile with an 8-degree rise to complement the geometry of Cervelo's road and gravel lineup.

Compatibility runs across the Caledonia-5, Aspero-5, R5, and R5-CX — so if you're building up or upgrading one of those frames, this stem is engineered to fit without compromise. An integrated top cap tidies up the front end aerodynamically, and the ST31 is ready to house internal Di2 cable routing for a clean electronic drivetrain setup. Six length options, from 80mm to 130mm, mean you can dial in your fit without reaching for a workaround.

Cervelo ST31 Stem Specs at a Glance

• Material: Carbon fiber
• Rise: 8 degrees
• Lengths available: 80mm, 90mm, 100mm, 110mm, 120mm, 130mm
• Internal Di2 cable routing compatible
• Compatible with: Caledonia-5, Aspero-5, R5, R5-CX