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Today’s DealsF-Si Carbon 5
A 29″ carbon frame hardtail crosscountry bike with upper mid-range components.
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Manufacturer Price
$2,199| Frame | Carbon |
|---|---|
| Suspension | Hardtail, 100mm |
| Fork | RockShox Reba |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 11 |
| Groupset | XT, SLX |
| Brakes | Shimano Deore Hydraulic Disc |
5'2" – 5'8"
5'6" – 5'11"
5'10" – 6'3"
6'1" – 6'7"
🐐 Estimated
None yet.
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Summary
The Cannondale F-Si is a high-performance cross-country bike praised for its lightweight carbon frame, efficient climbing, and responsive handling. The updated Lefty Ocho fork offers precise steering and smooth suspension, making it a standout for technical sections and descents. While it excels in race-ready performance, the absence of a dropper post and the high price tag are noted drawbacks.
Lightweight carbon frame
Efficient climbing and power delivery
Responsive and precise handling
Smooth suspension performance with Lefty Ocho fork
Good clearance for wider tires
High price tag
No dropper post included
Fork may feel harsh at lower speeds
This is a bike built for the privateer cross country or endurance racer.Bicycling
All in all it seems like the F-Si + Lefty Ocho combo can double as a proper pro-level race hardtail and a lightweight, competent singletrack trail bike as well.
It’s just pure, smooth suspension action, for superb control
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Dec 2019 · McCoy
A sleek, race-ready cross-country weapon

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

Nov 2018 · Steve Solt
This carbon hardtail is light, sharp, and features the distinctive Lefty Ocho fork

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.

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.
Jun 2015 · Logan VonBokel
The reigning U23 cross-country national champion's ride is chock-full of ENVE carbon, Cannondale tech, and American livery.
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
| Frame | F-Si, BallisTec Carbon, SAVE, PF30A, 1.5 Si Head Tube, Ai Offset, 27.5" (S), 29" (M-XL) BB Standard: PF30, Press Fit |
|---|---|
| Fork | RockShox Reba RL, 100mm, Solo Air, Tapered Steerer, Maxle Lite, 51mm offset Travel: 100mm Spring Type: Air |
| 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) Type: Rigid |
| Pedals | Not included |
| Grips | Cannondale Locking Grips |
| 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) Type: Shimano Deore Hydraulic Disc |
| Brake Levers | Shimano Deore MT-500 hydro disc |
| 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" |
First added February 20
Last updated February 20
Not listed for 3,020 days