Selle SMP F20 C SI Carbon Saddle

The Selle SMP F20 C SI Carbon Saddle is a purpose‑built, no‑compromise racing saddle for cyclists who value absolute efficiency, precise bike fit and minimal weight. Handcrafted in Italy and engineered around Selle SMP’s patented Designed on Your Bodyergonomics, the F20 C SI delivers direct rider‑to‑bike connection for elite road racing, triathlon, time trial and high‑intensity gravel or MTB use.

A favourite among performance riders, this carbon‑rail saddle is commonly selected during professional bike fitting and premium bicycle servicing across Queensland and Australia, where weight savings and anatomical support are critical.

Built for Riders Who Push Their Limits

The F20 C SI uses a short‑nose, compact profile with zero padding, allowing immediate power transfer and consistent pelvic stability during aggressive riding positions. The saddle is designed for experienced cyclists who prefer a firm contact point and rely on anatomical shaping—rather than cushioning—for comfort.

Ideal applications include:

• Road racing and criteriums
• Triathlon and time trial bikes
• Track cycling
• Performance gravel and cyclocross
• Cross‑country MTB race builds

It’s compatible with traditional bikes and e‑bikes, provided correct saddle clamp compatibility is observed.

Advanced Pressure Relief Through Shape, Not Foam

Despite its minimalist construction, the F20 C SI offers excellent comfort through intelligent design:

• A wide central channel reduces pressure and numbness
• The signature “eagle beak” saddle nose eases perineal load in aero positions
• Sculpted rear support zones align with the sit bones for stability

This anatomical approach supports sustained performance during long efforts and high cadence riding.

Carbon Rail Construction for Maximum Weight Savings

Equipped with unidirectional carbon rails (7.0 × 9.0 mm), the F20 C SI achieves exceptional weight reduction while maintaining rigidity under race loads. This makes it ideal for lightweight builds where every gram matters.

Approximate weight:

• With carbon rails: ~155 g

Important Seatpost Compatibility Guidelines

For optimal performance and safety with carbon rails, Selle SMP recommends the following:

• Use a seatpost that allows correct saddle positioning and alignment
• Avoid clamps with sharp edges that could damage the carbon rails
• Jaws should match the saddle rail profile for broad, even contact
• Minimum contact area of 8 cm² between clamp and rail
• Clamp contact length of at least 32 mm
• Symmetrical and parallel clamp surfaces are essential
• Use saddle clamps designed specifically for 7×9 mm oval carbon rails

Professional installation by a qualified bicycle mechanic is strongly advised—especially during high‑end builds and bike fitting appointments.

Fit Profile

• Sit bone width: 12.1–15.0 cm
• Cycling short sizes: M, L, XL, XXL
• Gender: Unisex (men and women)

This fit makes the saddle suitable for riders who need wider rear support while maintaining a minimalist race interface.

Technical Specifications

• Model: Selle SMP F20 C SI Carbon
• Colour options: Black, White, Red
• Width: 150 mm
• Length: 250 mm
• Shell: Carbon‑reinforced nylon 12
• Padding: None
• Cover: Microfiber
• Rails: Unidirectional carbon fibre 7.0 × 9.0 mm
• Weight: Approx. 155 g

Ideal For

• Competitive road and triathlon racing
• Lightweight performance bike builds
• Riders seeking maximum efficiency and stability
• Professional bike fitting and race setup optimisation