GANNA AERO FIN

GANNA Aero Fin Carbon Aerodynamic Seatpost

Premium high-performance aerodynamic carbon seatpost engineered specifically to minimise drag, maximise structural compliance, and provide a secure, slip-free clamping interface for modern road and time-trial racing setups.

Technical Specifications

Length: 300mm or 370mm
Setback / Offset: Available in 3-10mm (Depends on model)
Profile: Ultra-slim13mm aerodynamic trailing edge profile
Weight: Approx. 99g (300mm)
Construction: Monocoque Carbon Layup
Material: Full-carbon
Clamp Width: 47mm
Clamp Compatibility: Dual-bolt micro-adjustment mechanism (7x7mm round rails & 7x9mm oval carbon rails compatible)
Finish: Raw Naked Carbon produced via a laser-fused surface process

Aerodynamic Efficiency Without Compromise

The GANNA Aero Fin is sculpted to slice through oncoming air currents, utilising an ultra-narrow, deep-profile "fin" geometry that significantly minimises the low-pressure wake zone behind the seat tube. Constructed from a premium blend of Toray high-modulus carbon fibre, it maximizes fore-aft aerodynamic efficiency while retaining an exceptionally lightweight profile that satisfies demanding weight-weenie builds and crit racers alike.

The specialised structural layup isolates high-frequency road vibrations from the saddle, acting as a micro-suspension system over harsh tarmac without flexing laterally under hard, seated power efforts.

Secure Interlocking & Slip Prevention

Engineered to eradicate the common frustrations of slipping aero seatposts, the Aero Fin features a textured, high-friction contact zone along its insert length.

The post integrates seamlessly with frame-specific internal wedge clamps, distributing clamping forces evenly across the carbon walls to prevent structural crushing while ensuring a rock-solid hold at recommended torque values.

Micro-Adjustable Saddle Interface

Achieving the perfect bike fit is effortless thanks to a highly refined dual-bolt clamping head. The design offers independent micro-adjustments for saddle tilt and fore-aft positioning, making it incredibly simple to lock in aggressive, forward aero-positions or traditional endurance setups. Interchanging saddles is a breeze, as the cradle natively accepts both standard 7mm round alloy rails and tall 9mm oval carbon rails.

Available Configurations

The AERO FIN is offered in model-specific variants, each matched to the frame's seat tube interface, offset geometry, and clamp requirements. Select your bike model when ordering.

List updated as of May 2026.
Cervélo: S5 / Soloist
Specialized: SL7 / Allez / SL8
Merida: Reacto / Reacto 26
Pinarello: Dogma F
Factor: One / Ostro VAM 2.0
Colnago: V4RS / Y1RS
Canyon: Aeroad CFR/SLX 2023–2024 / Aeroad CFR/SLX 2025–2026
Cannondale: EVO4 / EVO5
Trek: Madone SL/SLR
Scott: Foil
XDS: X-Lab AD8 / AD9
Seka: Spear
Quick: ER One
Universal: 27.2mm round

Compatibility

Natively accommodates standard round (7x7mm) and oval carbon (7x9mm) saddle rails.

In The Box

1 x GANNA Aero Fin Carbon Seatpost
2x Full-carbon Saddle Rail Clamp
2 x Heavy-Duty Titanium Clamping Bolts
3 x Titanium Hardware Parts
1 x Premium Carbon Friction Paste Packet