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Today’s DealsF Si World Cup
A 29″ carbon frame hardtail crosscountry bike with ultra high-end components.
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Manufacturer Price
$9,500| Frame | Carbon |
|---|---|
| Suspension | Hardtail, 100mm |
| Fork | Cannondale Lefty Ocho Carbon |
| Wheels | 29″ Carbon |
| Drivetrain | 1 × 12 |
| Groupset | XX1 Eagle |
| Brakes | SRAM Level Ultimate Hydraulic Disc |
5'1" – 5'6"
5'4" – 5'9"
5'7" – 6'0"
5'10" – 6'3"
6'0" – 6'5"
🐐 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 power transfer, and responsive handling. The updated Lefty Ocho fork offers precise steering and forgiveness in technical sections, though it may feel harsh at lower speeds. While the bike excels in racing and technical terrain, its high price and proprietary components are notable drawbacks.
Lightweight carbon frame for efficient power transfer
Updated Lefty Ocho fork with precise steering
Responsive handling and quick sprints
Excellent climbing efficiency
Forgiving through technical sections
High price tag
Proprietary components and unique wheelset requirements
Fork may feel harsh at lower speeds
This is a bike built for the privateer cross country or endurance racer.Bicycling
Cannondale calls their trail-ready XC geometry OutFront, with a longer front end, slack head angle & lower trail combined with short 427mm chainstays.
Freakishly fast and ferociously focused XC weapon
If this bike was a dog, it would be a whippet, the sort of dog that needs a coat when it’s cold, and has legs that look impossibly skinny, and doesn’t make sense at all until you see it in motion, when everything comes together in a blur of blinding speed that it’s hard not to respect.
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Feb 2020 · Aaron Borrill
Fast, composed and damn-good looking, Cannondale's F-Si Carbon 3 proves the hardtail concept is anything but dead
Stealthy aesthetics
Impressive ride quality
Telepathic handling dynamics
Decent spec level
Could be lighter

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.

Apr 2016 · Philippe Tremblay
Have a close-up look at Gagné's Cannondale Lefty he was on at Sea Otter.
| Frame | ALL-NEW F-Si, Hi-MOD BallisTec Carbon, SAVE, PF30A, tapered head tube, Speed Release 12mm thru axle, Ai Offset BB Standard: PF30, Press Fit |
|---|---|
| Fork | ALL-NEW Lefty Ocho Carbon, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset Travel: 100mm |
| Bottom Bracket | Cannondale Alloy PressFit30 |
| Headset | Integrated, 1-1/8 to 1.5", sealed angular contact bearings (Integrated steer stop size small only) |
| Stem | Cannondale C1, 7075 Alloy, 1-1/8", 31.8, 7° |
| Handlebar | Cannondale C1 Flat, Carbon, 8° sweep, 760mm |
| Saddle | Prologo Zero II, Tirox rails |
| Seatpost | Cannondale C1 Full Carbon, 27.2 x 350/400mm Type: Rigid |
| Pedals | Not Included |
| Grips | Cannondale Locking Grips |
| Rear Derailleur | SRAM XX1 Eagle |
|---|---|
| Crank | SRAM XX1 Carbon, 34T, Ai Custom |
| Shifters | SRAM XX1 Eagle, 12-speed |
| Cassette | SRAM XG-1295, X01 Eagle, 10-50, 12-speed |
| Chain | SRAM X01 Eagle, 12-speed |
| Brakes | SRAM Level Ultimate hydro disc, 160/160mm Centerline rotors Type: SRAM Level Ultimate Hydraulic Disc |
| Brake Levers | SRAM Level Ultimate hydro disc |
| Rims | ENVE M525 Carbon, 24h, tubeless ready |
|---|---|
| Spokes | DT Swiss Aerolite (Ai Offset dish - rear) |
| Front Hub | Lefty 60 front, DT Swiss C36 12x148 rear w/ XD driver |
| Rear Hub | Lefty 60 front, DT Swiss C36 12x148 rear w/ XD driver |
| Tires | Schwalbe Racing Ray 29 x 2.25" front, Racing Ralph 2.25" rear, Snake Skin, Addix Speedgrip Compound, tubeless ready |
First added December 28
Last updated December 28
Not listed for 2,358 days