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2017 Cannondale

F-Si Carbon 4

A 27.5″ carbon frame hardtail crosscountry bike with upper mid-range components.
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Manufacturer Price

$2,799
FrameCarbon
SuspensionHardtail, 100mm
ForkCannondale Lefty
Wheels27.5″ Aluminum
Drivetrain2 × 11
GroupsetXT, SLX
BrakesShimano Deore Hydraulic Disc
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Insights
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

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Highest gear

(descending)

Reviews
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

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Mountain Bike Action
Cannondale Introduces the New F-Si and Lefty Ocho

Oct 2018 · McCoy

A new generation of Lefty is here

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

May 2018 · Cory Benson

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.

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BikeRadar
Cannondale F-Si Alloy 1 review

Sep 2016 · Guy Kesteven

The top metal F-Si is an impressively fast yet controlled and fatigue-free flyer. Buy if you favour alloy over carbon and enjoy racing rough, rocky trails on a forgiving ride

Highs
  • Impressively smooth and speed-sustaining yet efficiently quick frame, the Lefty fork is stiff, accurate and well damped

Lows
  • OK but not outstanding component selection, even with alloy frame

  • Specific front wheel and metal, QR axle frame limit upgrade potential

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Canadian Cycling Magazine
Trail Test: The Cannondale F-Si Carbon 2, an entry model with top specs for tearing up the XC course

Oct 2015 · Canadian Cycling Magazine

A brand’s base model of a bike line usually shows cost-saving choices throughout its spec. Often the frame material and production process are altered as well.

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Velo
Pro Bike Gallery: Keegan Swenson’s Cannondale F-Si Carbon Team

Jun 2015 · Logan VonBokel

The reigning U23 cross-country national champion's ride is chock-full of ENVE carbon, Cannondale tech, and American livery.

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MTBR
Pro Bike: Marco Fontana’s Cannondale F-Si Carbon Team

Mar 2015 · Kristen Gross

Lightweight racer of Italian national XC champ and Olympic bronze medalist spec'd with SRAM XX1 drivetrain, ENVE wheels, and Prologo saddle and grips. - Mtbr.com

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BIKE Magazine
Preview: All-new Cannondale F-Si Carbon 29

May 2014

Cannondale has announced the launch of the all-new 2015 F-Si Carbon 29. Based off the successful Cannondale F29, the F-Si sets the bar higher for a stiffer and lighter platform.

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Geometry
Specs
Build
Frame

F-Si, BallisTec Carbon, SPEED SAVE, PF30A, 1.5 Si Head Tube, Ai Offset, 27.5" (S), 29" (M-X)

BB StandardPF30, Press Fit

Fork

Lefty 2.0, 100mm, PBR Isolated Damper Technology with XC+ tune and updated controls, Offset - 50mm (S), 55mm (M-X)

Travel100mm

Shock

N/A

Bottom Bracket

Cannondale Alloy PressFit30

Headset

Cannondale HeadShok Si

Stem

Cannondale C3, 6061 Alloy, 1.5", 31.8, -5 deg.

Handlebar

Cannondale C3 flat, 6061 double-butted alloy, 700mm

Saddle

Prologo K3

Seatpost

Cannondale C3, 6061 alloy, 27.2x350mm (XS,S,M) 400mm (L,X)

TypeRigid

Pedals

N/A

Grips

Cannondale Locking Grips

Groupset
Rear Derailleur

Shimano XT, Shadow Plus, 11-speed

Front Derailleur

Shimano SLX, direct mount

Crank

Cannondale Si, Ai, BB30, FSA 26/36 rings

Shifters

Shimano SLX , 2x11

Cassette

SunRace, 11-40, 11-speed

Chain

KMC X11, 11-speed

Brakes

Shimano Deore hydraulic disc, 180/160mm (S-160/160mm)

TypeShimano Deore Hydraulic Disc

Brake Levers

Shimano Deore

Wheels
Rims

WTB STP i19 Tubeless Ready

Spokes

DT Swiss Competition (Ai Offset dish - Rear)

Front Hub

Lefty 60 front, Formula DC-1422 rear (Ai Offset dish - Rear)

Rear Hub

Lefty 60 front, Formula DC-1422 rear (Ai Offset dish - Rear)

Tires

Schwalbe Racing Ralph Performance 29/27.5x2.1", tubeless ready

Rider Notes
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First added April 13

Last updated April 13

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