When the original F-Si hit back in 2015 it changed the game. Pushed the limits. Changed peoples’ idea of what an XC hardtail could do. It’s even lighter – the lightest MTB frame we’ve ever made. Shorter Ai™ chainstays for more traction and kick on the climbs. Slacker head angle for even more OutFront™ control when things get dicey on descents. Improved stack and reach numbers for amore optimized rider position. Precise compliance tuning throughout the frame for more comfort seated or standing all while still having power transfer you need for full-gas efforts. And of course leading things off the stunning new Lefty Ocho. It’s a whole new level of XC capability tailor made to feed the needs of the XC obsessed
The all-new Lefty Ocho rewrites the book on XC performance. The smoothest stiffest ultra-light XC fork ever made it floats through chop and steers through the choss like nothing else. Silky smooth and unfazed no matter how hard you push it. Short chainstays do wonders for traction and nimble handling but they usually come at a cost. Usually ya gotta give something to get something. Not so with Ai the proprietary Asymmetric Integration drivetrain offset Cannondale have developed for the F-Si.
Key Features

BallisTec Hi-MOD Carbon Frame with 29er XC geometry; allows easier handling on the toughest of trails
Lefty Ocho Carbon 29” 100mm Fork has that famous eye-catching lefty style whilst delivering impressive performance in a vast range of terrain
SRAM XX1 Eagle AXS 1×12 Drivetrain delivers high performance elecronic shifting in any situation with enhanced stability manoeuvrability and efficiency
SRAM Level Ultimate Hydraulic Disc Brakes give powerful controllable and consistent stopping power with minimal effort in all conditions
Schwalbe Racing Ray Tubeless Ready Tyres have an aggressive tread in high-volume casing designed with great traction in mind

Frame
Hi-MOD BallisTec Carbon SAVE PF30-83 tapered head tube Speed Release 12mm thru axle Ai Offset

Fork
Lefty Ocho Carbon 29′ 100mm Chamber Damper with cable lockout OppO Spring System tapered steerer 55mm offset

Rear Shock
Null

Rims
ENVE M525 Carbon 24h tubeless ready

Spokes
DT Swiss Aerolite (Ai Offset dish – rear)

Pedals
Not Included

Crank
SRAM XX1 Eagle DUB 34T Ai offset

Bottom Bracket
SRAM DUB PF30 MTB83

Chain
SRAM XX1 Eagle 12-speed

Rear Cogs
SRAM XG-1299 10-50 12-speed

Front Derailleur
Null

Rear Derailleur
SRAM XX1 Eagle AXS

Shifters
SRAM Eagle AXS 12-speed

Handlebar
ENVE M5 Carbon 760mm 31.8mm 5mm rise 9deg sweep

Grips
Cannondale Locking Grips

Stem
Cannondale 1 7075 Alloy 1-1/8′ 31.8 7deg

Headset
Integrated 1-1/8 to 1.5′ sealed angular contact bearings (Integrated steer stop size small only)

Brakes
SRAM Level Ultimate hydro disc 160/160mm Centerline rotor

Brake Levers
SRAM Level Ultimate hydro disc

E-Bike Display
Null

E-Bike Battery
Null

E-Bike Charger
Null

E-Bike Drive Unit
Null

Saddle
Prologo Zero II Tirox rails

Seatpost
ENVE Carbon 27.2 x 400mm 0mm offset

Speeds
12

Extras
Speed Release rear axle

Connectivity
Wheel Sensor

Fork Travel
(F) 100mm

Frame Details
SAVE|PF30-83|Tapered head tube|Speed Release 12mm thru axle|Ai Offset

Frame Travel
Null

Front Hub
Lefty 60

Front Tire
(F) Schwalbe Racing Ray 27.5/29 x 2.25′ Snake Skin Addix Speedgrip Compound tubeless ready

Front Tire Size
2.25

Material
Carbon

Rear Hub
DT Swiss C36 12×148 w/ XD driver

Rear Tire
(R) Schwalbe Racing Ralph 27.5/29 x 2.25′ Snake Skin Addix Speed Compound tubeless ready

Tire Size
2.25