The PRO Vibe Carbon Stem is a race-ready stem built from full UD carbon for riders who want direct, stiff steering with minimal weight at the front end. At 147g for the 120mm version, it sits comfortably among the lightest stems in its class and is designed to integrate seamlessly with the wider PRO Vibe cockpit system.

Highlights

• Full UD carbon construction: delivers excellent lateral stiffness and a 147g weight for the 120mm length.
• Flippable +/-8 degree angle: run it rising or dropping to dial in your bar height and riding position.
• Evolved Puzzle Clamping System: alloy faceplate components hook securely onto stem protrusions and are retained by two alloy bolts for even, safe bar clamping.
• Shimano Di2 compatible: internal routing channels allow neat wiring management for electronic groupsets.
• Aerodynamically optimised profile: designed to pair with the PRO Vibe handlebar for a smooth, integrated front-end appearance.

Built for performance

Constructed entirely from unidirectional carbon — including the integrated top cap — the Vibe Carbon stem keeps the front end stiff and responsive under sprint loads and out-of-the-saddle efforts. The carbon top cap carries a 2Nm torque limit; always use a torque wrench when installing. Available from 80mm to 130mm in 10mm increments, so there is a length to suit most road and race fit positions.

Puzzle Clamping System

PRO's Puzzle Clamping System uses two alloy pieces for the bar faceplate, each hooking onto cast protrusions on the stem body and pulled together with alloy bolts. The design spreads clamping force evenly around the bar, reducing the risk of stress points that can occur with single-piece faceplates, while keeping assembly straightforward.

Compatibility & Fit

Handlebar clamp diameter: 31.8mm. Steerer (fork) clamp: 1-1/8 inch threadless/Ahead. This listing: 120mm length, +/-8 degree flippable angle, black. Compatible with Shimano Di2 electronic shifting systems. Always install carbon components to the manufacturer's torque specifications using a calibrated torque wrench and carbon assembly paste where specified.