2021 Cannondale F-Si Carbon 4

A 29″ carbon frame hardtail crosscountry bike with high-end components, priced near the low end of the F-Si model range. Compare the full range

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2021 Cannondale F-Si Carbon 4
MSRP$3,350
Weight24.5 lbs
Front Travel100mm
FrameCarbon
ForkCannondale Lefty Ocho
Wheels29″
Drivetrain1 × 12
GroupsetNX Eagle, Truvativ Stylo
BrakesHydraulic Disc
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Gearing

1 × 12 — 12 speed

F-Si Carbon 4

27 mph

Similar Bikes

27 mph

The F-Si Carbon 4 is geared about the same as similar bikes for riding up hills.

The F-Si Carbon 4 is geared about the same as similar bikes for riding downhill.


Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$500$1,000$1,500$2,000$2,500$3,000
This bike
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Specs
Build
Frame

BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset, SAVE, PF30-83, Tapered head tube, Speed Release 12mm thru axle, Ai Offset

BB StandardPF30, 83mm, press-fit

Fork

Lefty Ocho, 29", 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset

Bottom Bracket

SRAM DUB PF30 MTB83

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°

Handlebar

Cannondale 3 Flat, 6061 double-butted Alloy, 31.8mm, 3° rise, 8° sweep, 760mm

Saddle

Fabric Scoop Flat Elite, cro-mo rails

Seatpost

Cannondale 3, 7075 Alloy, 27.2 x 400mm

Grips

Cannondale Locking Grips

Groupset
Rear Derailleur

SRAM NX Eagle

Crank

Truvativ Stylo 6K DUB, 34T, Ai offset

Shifters

SRAM NX Eagle, 12-speed

Cassette

SRAM PG-1230, NX Eagle, 11-50, 12-speed

Chain

SRAM NX Eagle, 12-speed

Brakes

Shimano MT500 hydro disc, 160/160mm RT66 rotors

Brake Levers

Shimano MT500 hydro disc

Wheels
Rims

WTB STX i21 TCS, 28h, tubeless ready

Spokes

DT Swiss Champion

Front Hub

(F) Lefty 60

Rear Hub

(R) Formula 12x148 w/ HG driver

Tires

(F) Schwalbe Racing Ray Performance 27.5/29 x 2.25", Addix Compound, tubeless ready(R) Schwalbe Racing Ralph Performance 27.5/29 x 2.25" rear, Addix compound, tubeless ready

2021 Cannondale F-Si Carbon 4
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