Cannondale F-Si 4 Carbon 29" Mountain Bike 2020 - Hardtail MTB
Full Tilt XC. A mountain bike with more. More traction, more comfort, more capability to make every trail easier.
No other hardtail descends as fast, climbs as nimbly, or kicks as hard. With the otherworldly performance of the Lefty Ocho, this is next-level cross-country performance, tailor-made to feed the needs of the XC obsessed.
Our proprietary ballistec carbon lets us push boundaries and tune rigidity throughout the entire frame – for stiffness where you need it and compliance where you don’t. At just 900 grams (size m, with all paint and hardware) it's one of the lightest hardtails in the world
Key Features:
Designed For the Win: At just 900 grams, F-Si is the lightest mountain bike frame we’ve ever made. Better still, our engineers built in real compliance, real durability, and the handling and features that really win races.
Next-Level Geometry: F-Si attacks the steepest climbs and nastiest descents of modern World Cup XC courses. Ai offset drivetrain and OutFront steering geometry deliver an uncanny mix of stability, agility and traction.
The Best XC Fork…Period: Simply the most advanced, smoothest, most precise-handling ultralight XC fork ever made. Its one-of-a-kind design lets it float through the chop and steer through the choss like nothing else.
Occasionally, without notice, manufacturers change product design and/or specifications.
| Frame | BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset |
| Fork | Lefty Ocho, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset |
| 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° |
| Bars | Cannondale 3 Flat, 6061 double-butted Alloy, 31.8mm, 3° rise, 8° sweep, 760mm |
| Front Brake | Shimano MT500 hydro disc, 160mm RT66 rotors |
| Rear Brake | Shimano MT500 hydro disc, 160mm RT66 rotors |
| Brake Lever | Shimano MT500 hydro disc |
| Rear Mech | SRAM NX Eagle |
| Shifters | SRAM NX Eagle, 12-speed |
| Speed | 12 |
| Rims | WTB STX i21 TCS, 28h, tubeless ready |
| Front Hub | Lefty 60 |
| Rear Hub | Formula 12x148 w/ HG driver |
| Spokes | DT Swiss Champion |
| Front Tyre | Schwalbe Racing Ray Performance 27.5/29 x 2.25", Addix Compound, tubeless ready |
| Rear Tyre | Schwalbe Racing Ralph Performance 27.5/29 x 2.25" rear, Addix compound, tubeless ready |
| Seat Post | Cannondale 3, 7075 Alloy, 27.2 x 400mm |
| Saddle | Fabric Scoop Flat Elite, cro-mo rails |
| Chainset | Truvativ Stylo 6K DUB, 34T, Ai offset |
| Bottom Bracket | SRAM DUB PF30 MTB83 |
| Chain | SRAM NX Eagle, 12-speed |
| Cassette | SRAM PG-1230, NX Eagle, 11-50, 12-speed |
| Pedals | Basic Resin Flat |
F-Si Sizing
See the table below to find the right size Cannondale F-Si.
|
Frame Size |
Height Range |
||
|
Inches |
Size
|
Feet & Inches |
Centimetres |
|
14 |
X Small |
5’ 0” – 5’ 4” |
152 – 162 |
|
16 |
Small |
5’ 4” – 5’ 6” |
162 – 168 |
|
18 |
Medium |
5’ 6” – 5’ 10” |
168 – 178 |
|
20 |
Large |
5’ 10” – 6’ 1” |
178 – 186 |
|
22 |
X Large |
6’ 1” – 6’ 4” |
186 – 192 |
|
24 |
XX Large |
6’ 4” – 6’ 7” |
192 - 200 |
Read our bike size guide for more information on sizing.
F-Si Geometry
|
|
XS (27.5”) |
S (29”) |
M (29”) |
L (29”) |
XL (29”) |
|
Seat Tube Length (cm/in) |
33/13 |
- |
43 / 16.9 |
48 / 18.9 |
53 / 20.9 |
|
Top Tube Horizontal (cm/in) |
55.3 / 21.8 |
58.3 / 23 |
60.6 / 23.9 |
62.9 / 24.8 |
65.3 / 25.7 |
|
Head Tube Angle |
69 |
- |
- |
- |
- |
|
Seat Tube Angle Effective |
73.1 |
- |
- |
- |
- |
|
Standover (cm/in) |
71.5 / 28.1 |
75.5 / 29.7 |
79.3 / 31.2 |
82.8 / 32.6 |
86.3 / 34 |
|
Head Tube Length (cm/in) |
9 / 3.5 |
9 / 3.5 |
10.1 / 4 |
11.3 / 4.4 |
12.6 / 5 |
|
Wheelbase (cm/in) |
105.5 / 41.6 |
108.6 / 42.8 |
111 / 43.7 |
113.4 / 44.7 |
115.9 / 45.6 |
|
Front Center (cm/in) |
63.6 / 25.1 |
66.7 / 26.3 |
69.1 / 27.2 |
71.4 / 28.1 |
73.9 / 29.1 |
|
Chainstay Length (cm/in) |
42.3 / 16.7 |
42.7 . 16.8 |
- |
- |
- |
|
Bottom Bracket Drop (cm/in) |
4.5 / 1.8 |
6.2 / 2.4 |
- |
- |
- |
|
Bottom Bracket Height (cm/in) |
30.8 / 12.1 |
- |
- |
- |
- |
|
Fork Rake (cm/in) |
5 / 2 |
5.5 / 2.2 |
- |
- |
- |
|
Trail (cm/in) |
8.2 / 3.2 |
8.2 / 3.2 |
8.2 / 3.2 |
- |
- |
|
Stack (cm/in) |
56.9 / 22.4 |
60.2 / 23.7 |
61.2 / 24.1 |
62.3 / 24.5 |
63.5 / 25 |
|
Reach (cm/in) |
38 / 15 |
40 / 15.7 |
42 / 16.5 |
44 / 17.3 |
46 / 18.1 |
Read our Mountain Bike Geometry Explained guide for more information on MTB geometry.
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