2021 Cannondale F-Si Carbon 2

A 29″ carbon frame hardtail crosscountry bike with ultra high-end components, priced near the low end of the F-Si model range. Compare the full range

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2021 Cannondale F-Si Carbon 2
Weight20.9 lbs / 9.5 kg
Front Travel100mm
ForkCannondale Lefty Ocho Carbon
Wheels29″ Carbon
Drivetrain1 × 12
BrakesHydraulic Disc
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1 × 12 — 12 speed

2021 Cannondale F-Si Carbon 2
29 mph
Similar Bikes
27 mph

The F-Si Carbon 2 is geared about the same as similar bikes for riding up hills.

Similar bikes won‘t keep up with the F-Si Carbon 2 while riding downhill or sprinting.

Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

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This bike
Other crosscountry bikes


FrameBallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset, SAVE, PF30-83, Tapered head tube, Speed Release 12mm thru axle, Ai Offset
ForkLefty Ocho Carbon, 27.5/29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 50/55mm offset
Bottom BracketCannondale Alloy PressFit30
HeadsetIntegrated, 1-1/8 to 1.5", sealed angular contact bearings (Integrated steer stop size small only)
StemCannondale 1, 7075 Alloy, 1-1/8", 31.8, 7°
HandlebarCannondale 1 Flat, Carbon, 31.8mm, 9° backsweep, 760mm
SaddleFabric Scoop Flat Race, titanium rails
SeatpostCannondale 2 Carbon 27.2x400
GripsCannondale Locking Grips
Rear DerailleurShimano XTR, Shadow Plus
CrankHollowGram, BB30 w/X-Sync® SpideRing, 34T, Ai offset
ShiftersShimano XT, 12-speed
CassetteShimano XT, 10-51, 12-speed
ChainShimano XT, 12-speed
BrakesShimano Deore XT Race disc, 160/160mm XT rotors
Brake LeversShimano Deore XT Race hydro disc
RimsHollowGram 23, Superlight Hi-Impact Carbon, tubeless ready, 28h, 23mm inner width
SpokesFormula Grand Forza
Front Hub(F) Lefty 60
Rear Hub(R) Hollowgram w/ DT internals 12x148 w/ Micro Spline
Tires(F) Schwalbe Racing Ray 27.5/29 x 2.25", Snake Skin, Addix Speedgrip Compound, tubeless ready
2021 Cannondale F-Si Carbon 2