The PRO Missile Evo Carbon Stem is a purpose-built time trial and triathlon cockpit piece that delivers wind-tunnel-developed aerodynamics in a one-piece UD carbon monocoque construction. Designed to pair with the PRO Missile Evo aerobar, it integrates internal cable routing to hide brake and shift lines from the airflow — a clean, fast solution for race-day set-ups demanding every marginal gain at the front end.

Highlights

• Wind-tunnel-developed aero profile: shaped to minimise frontal area and complement the Missile Evo cockpit system for optimum aerodynamic performance.
• Full UD carbon monocoque: one-piece construction delivers excellent rigidity and strength while keeping weight low.
• Internal cable routing: brake and shift cables are routed internally, removing clutter and drag from your front end.
• Di2 compatible: supports Shimano Di2 electronic shifting for a tidy, professional installation.
• UCI legal: complies with UCI regulations for use in sanctioned time trial and triathlon events.
• Integrated carbon gap cap: keeps the assembly looking purposeful and polished at the steerer top.

Aero by design

Every surface of the Missile Evo stem has been shaped with aerodynamic intent. The profile was developed in the wind tunnel as part of the broader Missile Evo cockpit system — the same equipment trusted by professional cycling teams. Cables disappear internally so nothing interrupts the clean lines from bar to steerer, and the stem face blends into your base bar for a low-drag front end that looks as fast as it is.

Carbon construction

Full one-piece UD carbon fibre monocoque construction gives the Missile Evo stem the rigidity demanded by sprint-effort time trialling, with none of the assembly joints or bonding lines that multi-piece stems carry. The integrated carbon gap cap finishes the build cleanly at the steerer, adding to the race-ready aesthetic without compromising function.

Compatibility & fit

This stem fits a 1-1/8 inch (28.6mm) diameter steerer and clamps 31.8mm oversized handlebars. The 85mm length with a -10° angle positions the bar low and forward for an aggressive time trial or triathlon position. Internal routing is compatible with Shimano Di2 electronic shifting. Designed for use with the PRO Missile Evo aerobar and base bar system.