IDR 49,000,000.00
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Light, but with weighty performance!

No other hardtail descends as fast, climbs as nimbly, or kicks as hard. With the otherworldly performance of the Lefty Ocho, this is next-level cross-country performance, tailor-made to feed the needs of the XC obsessed.


  • Hi-Mod BallisTec carbon frame
  • Lefty Ocho fork with 100mm travel
  • Shimano XTR 1x12-speed drivetrain
  • Shimano XTR Race disc brakes

Innovations & Technologies of the F-Si Carbon

Ballistec Hi-Mod Carbon

The Hi-Mod version consists of a sophisticated mix of carbon fibers that form a reinforcing net. Because of its extreme strength, Cannondale achieves enormous stiffness with less material, so the overall weight is kept to a minimum. The Hi-Mod fibres offer a communicative, vibrant riding experience that connects the rider even more closely to the road and gives him more control to push his limits.

SAVE Micro-Suspension

The SAVE Micro-Suspension tunes the overall compliance of the frame. The rear triangle flexes vertically for shock absorption. An optimized carbon layup in the seat tube allows controlled fore/aft bowing, for better traction, higher speeds and drastically minimized fatigue, whether seated or standing.

Lefty Ocho

It floats over bumps and steers the front wheel through demanding terrain like no other fork. No matter how demanding you are, the Lefty Ocho stays smooth and lets you ride harder and faster than ever before. For stable, superior handling on fast descents and agile handling on climbs, Cannondale has combined an extra long fork offset with a shallower steering angle to maintain the OutFront steering geometry.

Hidden Seatpost Collar

For seated comfort, designing the F-Si with a 27.2mm seatpost was just the start. The collarless seatpost clamp takes it even further, lowering the clamping point so that more of the post can flex.

Speed Release Thru-Axle

A faster kind of thru-axle. Slotted dropout design lets the axle stay in the hub for quicker, easier wheel changes.

Incredible traction when it counts

Make climbing easier and handling smoother thanks to the proprietary Cannondale Ai offset drivetrain, without sacrificing mud/tire clearance or limiting your set-up options.
Extra: Cannondale Wheel Sensor | Speed Release axles
Fork: Lefty Ocho Carbon | 100mm | Chamber Damper | Lockout | OppO Spring System | 55mm Offset
Frame: Hi-MOD BallisTec Carbon | SAVE | Speed Release | Ai Offset
Rims: HollowGram 23 | Superlight Hi-Impact Carbon | Tubeless Ready
Shifter: Shimano XTR
Tires: Front: Schwalbe Racing Ray | 29 x 2.25" | Snake Skin | Addix Speedgrip | Tubeless Ready
Rear: Schwalbe Racing Ralph | 29 x 2.25" | Snake Skin | Addix Speed | Tubeless Ready