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Product Description


The Cannondale F-Si Carbon 2 is a lightweight and fast hardtail cross-country bike that comes in at an affordable price. Cannondale designed the F-Si to provide the best balance of climbing and descending in an ultra-lightweight frame. This bike is a brilliant sprinter, stable through technical terrain, and has extremely confident handling. Any rider who is ready to rip through a cross-country race or make the most out of their casual day on the trail can have a great time on the Cannondale F-Si Carbon 2.

The BallisTec carbon frame of the Cannondale F-Si keeps it very lightweight while lowering the price compared to Hi-Mod carbon models. This helps you fly up climbs without losing any of the confident descending you need. The new Lefty Ocho fork is responsible for a huge amount of the bike’s weight reduction, coming in at 250 grams lighter than its previous iteration. This single-sided fork is not only very lightweight, but also adds strength, stiffness, and responsive steering. With race-tuned stiffness and a smooth suspension with low friction, the Lefty Ocho fork tops off an extremely impressive frame.

The geometry of the Cannondale F-Si promotes race-quality performance. It is longer and lower, increasing the reach of the headtube slightly for the best control. A low flat back gives centered weight distribution, letting you stay in your most efficient race position without losing any stability or control. The Ai offset drivetrain helps keep the chainstays very short for traction and agility, especially on climbs. An integrated seat binder allows for more length on the seatpost which provides some extra comfort on this hardtail machine. From top to bottom, the F-Si is designed to keep you moving at a blazing fast pace without losing an ounce of comfort or control.

A smooth ride quality is imperative for cross-country riders and the F-Si delivers on that need. Race-tuned stiffness provides outstanding power transfer of flat ground while delivering a smooth feel and proper dissipation of energy from bumps and vibration. Flat mount disc brakes add to that smooth quality, providing modulated stopping power in all weather conditions along with heat dissipation. This version is equipped with a SRAM X01 Eagle 12-speed groupset for some of the very best mechanical shifting on the market. Cannondale’s F-Si Carbon 2 is a brilliant choice for the rider who wants a balance of brilliant performance and an excellent value.


  • Frame: F-Si BallisTec Carbon, SAVE, PF30A, tapered head tube, Speed Release 12mm thru-axle, Ai Offset
  • Fork: Lefty Ocho Carbon 27.5/29”, 100mm Chamber Damper with cable lockout, OppO Spring System. Tapered steerer, 50/55mm offset
  • Headset: Integrated 1 1/8 – 1 1/2 sealed angular contact bearings
  • Seatpost: Cannondale C1 Full Carbon, 27.2 x 350/400mm


  • Bottom Bracket Cannondale Alloy PressFit30
  • Brake Calipers Shimano Deore XT Hydro Disc
  • Brake Levers Shimano Deore XT Hydro Disc
  • Cassette SRAM XG-1275, GX Eagle, 10-50, 12-Speed
  • Chain SRAM GX Eagle, 12-Speed
  • Crankset Truvativ Stylo Carbon, 34T, Ai Custom
  • Fork Lefty Ocho, 27.5/29", 100mm, Chamber Damper With Cable Lockout, OppO Spring System, Tapered Steerer, 50/55mm Offset
  • Grips Cannondale Locking Grips
  • Handlebar Cannondale C1 Flat, Carbon, 8-Degree Sweep, 760mm
  • Headset Integrated, 1-1/8 To 1.5", Sealed Angular Contact Bearings (Integrated Steer Stop Size Small And Extra Small Only)
  • Pedals Not Included
  • Rear Derailleur SRAM X01 Eagle
  • Rotors Shimano Deore XT Hydro Disc, 160/160mm XT Rotors
  • Saddle Fabric Scoop Flat Race, Ti Rails
  • Seatpost Cannondale C1 Full Carbon, 27.2 X 350/400mm
  • Shifters SRAM X01 Eagle, 12-Speed
  • Stem Cannondale C1, 7075 Alloy, 1-1/8", 31.8, 7-Degree
  • Tires Schwalbe Racing Ray 27.5/29 X 2.25" Front, Racing Ralph 2.25" Rear, Snake Skin, Addix Speedgrip Compound, Tubeless Ready
  • Wheel - Front HollowGram 23 Carbon Rim, Lefty 60 Hub, Superlight Hi-Impact Carbon, Tubeless Ready, 28h, 23mm Inner Width, Double-Butted Straight Pull Spokes
  • Wheel - Rear HollowGram 23 Carbon Rims, HollowGram 12x148 Rear W/ DT Swiss Internals Hub, Superlight Hi-Impact Carbon, Tubeless Ready, 28h, 23mm Inner Width, Double-Butted Straight Pull (Ai Offset Dish) Spokes
*Specifications are subject to change.


Bike Geometry
SizeSeat Tube (c-c)Seat Tube (c-t)Top Tube LengthHead Tube LengthChain Stay LengthSeat Tube AngleHead Tube AngleStand Over HeightWheel SizeStackReach
XS 330 - 553 90 423 73.1 69.0 715 - 569 380
S * - 583 90 427 - - 755 - 602 400
M 430 - 606 101 - - - 793 - 612 420
L 480 - 629 113 - - - 828 - 623 440
XL 530 - 653 126 - - - 863 - 635 460

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