2020 Cannondale

F-Si Carbon 4

A 29″ carbon frame hardtail crosscountry bike with upper mid-range components.
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MSRP$3,350
Weight24.5 lbs  
FrameCarbon
SuspensionHardtail, 100mm
ForkCannondale Lefty Ocho
Wheels29″ Aluminum
Drivetrain1 × 12
GroupsetNX Eagle, Truvativ Stylo
BrakesHydraulic Disc
Where to Buy
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
F-Si Carbon 4
Other Crosscountry bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

27 mph

F-Si Carbon 4

27 mph

Similar Bikes

Highest gear

(descending)

Sizing
SM

5'2" – 5'5"

MD

5'5" – 5'10"

LG

5'7" – 6'1"

XL

6'0" – 6'6"

Rider Fit Notes

None yet.

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Reviews
Cycling News
Cannondale F-Si Carbon 3 review

Feb 2020 · Aaron Borrill

Fast, composed and damn-good looking, Cannondale's F-Si Carbon 3 proves the hardtail concept is anything but dead

Highs
  • Stealthy aesthetics

  • Impressive ride quality

  • Telepathic handling dynamics

  • Decent spec level

Lows
  • Could be lighter

Read Review

Mountain Bike Action
MBA Bike Test: Cannondale F-Si Carbon 3

Dec 2019 · McCoy

A sleek, race-ready cross-country weapon

Read Review

MTBR
Review: Cannondale F-Si Throwback

Oct 2019

- Mtbr.com

Read Review

BikeRadar
Cannondale F-Si Hi-Mod World Cup review

Jan 2019 · Guy Kesteven

Uniquely-forked, arse-kicking ultralight XC racer but not for the faint-hearted or under-financed. Buy if you want a fast and ferocious XC racer

Highs
  • Unique fork and wishlist kit spec make it a real head turner, seriously light yet stiff enough to track hard, well-controlled but lightweight fork, nicely balanced between max power delivery and reasonable punishment

Lows
  • Unique features can create spares issues, high cost goes with the territory, not the lightest frame, fork or off-the-peg bike

Read Review

Bicycling
The Cannondale F-Si Carbon 2 Is a Privateer Racer's Dream

Nov 2018 · Steve Solt

This carbon hardtail is light, sharp, and features the distinctive Lefty Ocho fork

Read Review

Bikerumor
First Rides: Cannondale F-Si hardtail & Lefty Ocho fork on a World Cup XC course

May 2018

Before the World Cup XC racing in Albstadt, we put in some first rides on Cannondale's next gen carbon XC hardtail & its all-new single crown Lefty fork. Built as an ultimate hardtail for steep & technically challenging modern courses, we turned some hot laps on the World Cup track, riding with the bike's design team.

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset

BB StandardPF30, 83mm, Press Fit

ColorCrush

Fork

Lefty Ocho, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset

Travel100mm

Bottom Bracket

SRAM DUB PF30 MTB83

Headset

Integrated, 1-1/8 to 1.5", sealed angular contact bearings (Integrated steer stop size small only)

Stem

Cannondale 3, 6061 Alloy, 31.8, 7°

Handlebar

Cannondale 3 Flat, 6061 double-butted Alloy, 31.8mm, 3° rise, 8° sweep, 760mm

Saddle

Fabric Scoop Flat Elite, cro-mo rails

Seatpost

Cannondale 3, 7075 Alloy, 27.2 x 400mm

TypeRigid

Pedals

Not Included

Grips

Cannondale Locking Grips

Groupset
Rear Derailleur

SRAM NX Eagle

Crank

Truvativ Stylo 6K DUB, 34T, Ai offset

Shifters

SRAM NX Eagle, 12-speed

Cassette

SRAM PG-1230, NX Eagle, 11-50, 12-speed

Chain

SRAM NX Eagle, 12-speed

Brakes

Shimano MT500 hydro disc, 160/160mm RT66 rotors

TypeHydraulic Disc

Brake Levers

Shimano MT500 hydro disc

Wheels
Rims

WTB STX i21 TCS, 28h, tubeless ready

Spokes

DT Swiss Champion

Front Hub

(F) Lefty 60

Rear Hub

(R) Formula 12x148 w/ HG driver

Tires

(F) Schwalbe Racing Ray Performance 27.5/29 x 2.25", Addix Compound, tubeless ready(R) Schwalbe Racing Ralph Performance 27.5/29 x 2.25" rear, Addix compound, tubeless ready

Rider Notes
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Last updated October 28
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