The PRO Vibe Carbon stem brings race-proven stiffness and a clean aerodynamic profile to your road cockpit. Built from full unidirectional carbon, it delivers direct, confidence-inspiring steering response while keeping weight impressively low — ideal for performance road riders who want to sharpen their front end without compromise.

Highlights

  • Full UD carbon construction: maximises stiffness-to-weight ratio for confident steering under hard efforts.
  • Reversible +/-8 degree angle: flip the stem to fine-tune your riding position without needing a different part.
  • Shimano Di2 compatible: internal routing provisions keep your cockpit free of exposed wiring for a tidy finish.
  • Aerodynamically optimised profile: the slim form tidies the front of the bike and suits a race-focused build.
  • Puzzle-style handlebar clamp: two alloy clamp pieces distribute clamping load evenly across the bar for secure, damage-free grip.
  • Weight from 120g: one of the lightest stems in PRO's road range.

Built for performance road riding

The Vibe Carbon is PRO's benchmark road stem — the same platform trusted by Shimano-sponsored WorldTour professionals. The unidirectional carbon layup provides a notably stiff feel underfoot when sprinting or climbing out of the saddle, while the clean silhouette suits both classic and modern road builds. The carbon construction is complemented by a carbon top cap, which should be installed carefully at the recommended torque.

Reversible angle for fit flexibility

With a reversible design offering +8 or -8 degrees of rise, the Vibe Carbon gives you genuine fit versatility from a single stem. Run it positive for a more upright position, or flip it negative for a lower, more aggressive front-end drop. Installation is straightforward, and no additional hardware is needed to switch between angles.

Compatibility & Fit

Handlebar clamp diameter: 31.8mm. Steerer / fork interface: 1-1/8 inch (28.6mm). Stem length: 100mm. Angle: +/-8 degrees (reversible). Available in lengths from 80mm to 130mm (in 10mm increments) across the range. Suitable for Shimano Di2 cockpits where internal stem-routing is preferred. Confirm your handlebar uses a 31.8mm clamp section and your fork has a 1-1/8 inch steerer before fitting. Follow PRO's torque specifications and treat the carbon top cap with care during installation.

PRO components carry a limited manufacturer's warranty against defects. For warranty support, return the item to Tune Cycles.
  • Full unidirectional (UD) carbon body for maximum stiffness with minimal weight
  • Weight from 120g — among the lightest stems in the PRO road range
  • Reversible design provides +8 or -8 degree angle from a single stem
  • Shimano Di2 compatible with internal wiring routing provisions
  • Aerodynamically optimised profile for a clean, race-ready cockpit
  • Puzzle-style alloy faceplate distributes clamp load evenly across the handlebar
  • Available in 80–130mm lengths (in 10mm steps) across the Vibe Carbon range
BrandPRO (Shimano)
ModelVibe Carbon
Part NumberPRSS0504
Length100mm
Handlebar Clamp Diameter31.8mm
Steerer Diameter1-1/8 inch (28.6mm)
Angle+/-8 degrees (reversible)
MaterialFull unidirectional (UD) carbon
WeightFrom 120g (top cap excluded)
ColourBlack
Di2 CompatibleYes (internal routing)
SKU SHM-PRSS0504
Barcode # 8717009402477
Brand PRO

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