Profile Design SLC Extensions
Best lightweight carbon extensions for cyclists seeking a customizable, ergonomic aero position.
These carbon extensions prioritize weight savings and ergonomic versatility, letting you toggle between an aggressive, head-down tuck or a more relaxed, shrugged posture. While the customization requires a bit of DIY cutting to dial in your fit, the internal routing compatibility makes for a remarkably clean, clutter-free cockpit.
$198.00
at
Profile Design
Who it's for
- Endurance cyclists seeking relief from wrist and forearm fatigue
- Competitive riders needing a precise, dialed-in aerodynamic fit
- Climbers and racers prioritizing every gram of weight savings
Who should skip it
- Budget-conscious cyclists looking for affordable aluminum upgrades
- Mechanics or riders uncomfortable with precise torque requirements
- Cyclists preferring a flat or aggressive straight-bar hand position
Performance breakdown
Weight Optimization
Super Light Carbon construction significantly reduces front-end mass for better handling.
Ergonomic Versatility
Dual-angle design accommodates both aggressive and relaxed riding postures effectively.
Integration Capability
Aeroport compatibility makes internal Di2 routing clean and remarkably straightforward.
Customization Potential
Generous 400mm length allows for precise trimming to match individual reach.
Lateral Adjustability
Lateral shift options provide excellent fine-tuning for optimal hand width.
System Compatibility
Standard 22.2mm diameter ensures seamless integration with most existing aerobar systems.
Key Specs
Extension Length
400mm
Extension Angle
45/25c (First section at 45°, grip at 25°)
Compatibility
Fits any aerobar designed for 22.2mm extensions
Cable Routing
Drilled for rear-exit cable routing
Di2 Compatibility
Designed to fit Shimano Di2 EW-RS910 junction box and BT-DN110 battery with the Aeroport adapter
Still have a question?
Ask Metto anything about the Profile Design SLC Extensions before you decide.