2018 Cannondale

F-Si Carbon 5

A 29″ carbon frame hardtail crosscountry bike with upper mid-range components.
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Manufacturer Price

$2,199
FrameCarbon
SuspensionHardtail, 100mm
ForkRockShox Reba
Wheels29″ Aluminum
Drivetrain1 × 11
GroupsetXT, SLX
BrakesHydraulic 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)

25 mph

F-Si Carbon 5

27 mph

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Highest gear

(descending)

Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

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

Dec 2019 · McCoy

A sleek, race-ready cross-country weapon

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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

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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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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.

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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

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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Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

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

BB StandardPF30, Press Fit

Fork

RockShox Reba RL, 100mm, Solo Air, Tapered Steerer, Maxle Lite, 51mm offset

Travel100mm

Spring TypeAir

Bottom Bracket

Cannondale Alloy PressFit30

Headset

Cannondale HeadShok Si

Stem

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

Handlebar

Cannondale C3 flat, 6061 double-butted Alloy, 760mm

Saddle

Cannondale Stage 3

Seatpost

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

TypeRigid

Pedals

Not included

Grips

Cannondale Locking Grips

Groupset
Rear Derailleur

Shimano XT, 11-speed Shadow Plus

Crank

Cannondale Si, BB30 w/ Ai SpideRing, X-Sync®, 32t

Shifters

Shimano SLX, 11-speed

Cassette

SunRace, 11-46, 11-speed

Chain

KMC X11, 11-speed

Brakes

Shimano Deore MT-500 hydro disc, 180/160mm (S-160/160mm)

TypeHydraulic Disc

Brake Levers

Shimano Deore MT-500 hydro disc

Wheels
Rims

WTB STP i19 Tubeless Ready

Spokes

DT Swiss Competition (Ai Offset dish - Rear)

Front Hub

Formula DC51 front, Formula DC-1422 (Ai Offset dish - Rear), QR

Rear Hub

Formula DC51 front, Formula DC-1422 (Ai Offset dish - Rear), QR

Tires

Schwalbe Racing Ralph Performance 29/27.5x2.25"

Rider Notes
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Last updated February 20
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