Bicycle comparison

Specification	2021 Cannondale F-Si Carbon 4	2020 Cannondale F-Si Carbon 4
Overview
Model year	2021	2020
Brand	Cannondale	Cannondale
Model	F-Si Carbon 4	F-Si Carbon 4
Bicycle type	Mountain	Mountain
Archive ID	900004714	900002985
Colors	Alpine (ALP); Silver (SLV)	Graphite (GRA); Crush (CRU)
Sizes	S, M, L, XL	S, M, L, XL
Frameset
Frame construction	BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset	BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset
Frame material	Carbon	Carbon
Fork	Lefty Ocho, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset	Lefty Ocho, 29”, 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 55mm offset
Drivetrain
Shifters	SRAM NX Eagle, 12-speed	SRAM NX Eagle, 12-speed
Rear derailleur	SRAM NX Eagle	SRAM NX Eagle
Crankset	SRAM X1-1000 Eagle DUB, 34T, Ai offset	Truvativ Stylo 6K DUB, 34T, Ai offset
Bottom bracket	SRAM DUB PF30 MTB83	SRAM DUB PF30 MTB83
Rear cogs	SRAM SX Eagle, 11-50, 12-speed	SRAM PG-1230, NX Eagle, 11-50, 12-speed
Chain	SRAM SX Eagle, 12-speed	SRAM NX Eagle, 12-speed
Pedals	Not included	Not Included
Brakes
Brakes	Shimano MT500 hydraulic disc, 160/160mm RT54 rotors	Shimano MT500 hydro disc, 160/160mm RT66 rotors
Cockpit & contact points
Headset	Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small and extra small only)	Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small only)
Handlebar	Cannondale 2 Flat, butted 2014 Alloy, 31.8mm, 3° rise, 8° sweep, 760mm	Cannondale 3 Flat, 6061 double-butted Alloy, 31.8mm, 3° rise, 8° sweep, 760mm
Stem	Cannondale 3, 6061 Alloy, 31.8, 7°	Cannondale 3, 6061 Alloy, 31.8, 7°
Saddle	Fabric Scoop Shallow Sport, steel rails	Fabric Scoop Flat Elite, cro-mo rails
Seatpost	Cannondale C3, 6061 Alloy, 27.2 x 350mm (S), 400mm (M-XL)	Cannondale 3, 7075 Alloy, 27.2 x 400mm
Wheels & tires
Hubs	(F) Lefty 60 / (R) Shimano MT400 12x148mm thru-axle	(F) Lefty 60 (R) Formula 12x148 w/ HG driver
Rims	WTB STX i23 TCS, 32h, tubeless ready	WTB STX i21 TCS, 28h, tubeless ready
Spokes	DT Swiss Competition	DT Swiss Champion
Front tire	Schwalbe Racing Ray Performance, 29 x 2.25”, Addix Compound, tubeless ready,	Schwalbe Racing Ray Performance 27.5/29 x 2.25”, Addix Compound, tubeless ready
Rear tire	Schwalbe Racing Ralph Performance, 29 x 2.25”, Addix Compound, tubeless ready	Schwalbe Racing Ralph Performance 27.5/29 x 2.25” rear, Addix compound, tubeless ready
Wheel size	29	29"

Specification

2021 Cannondale F-Si Carbon 4

2020 Cannondale F-Si Carbon 4

Overview

Model year

2021

2020

Brand

Cannondale

Model

F-Si Carbon 4

Bicycle type

Mountain

Archive ID

900004714

900002985

Colors

Alpine (ALP); Silver (SLV)

Graphite (GRA); Crush (CRU)

Sizes

S, M, L, XL

Frameset

Frame construction

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

Frame material

Carbon

Fork

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

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

Drivetrain

Shifters

SRAM NX Eagle, 12-speed

Rear derailleur

SRAM NX Eagle

Crankset

SRAM X1-1000 Eagle DUB, 34T, Ai offset

Truvativ Stylo 6K DUB, 34T, Ai offset

Bottom bracket

SRAM DUB PF30 MTB83

Rear cogs

SRAM SX Eagle, 11-50, 12-speed

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

Chain

SRAM SX Eagle, 12-speed

SRAM NX Eagle, 12-speed

Pedals

Not included

Not Included

Brakes

Shimano MT500 hydraulic disc, 160/160mm RT54 rotors

Shimano MT500 hydro disc, 160/160mm RT66 rotors

Cockpit & contact points

Headset

Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small and extra small only)

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

Handlebar

Cannondale 2 Flat, butted 2014 Alloy, 31.8mm, 3° rise, 8° sweep, 760mm

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

Stem

Cannondale 3, 6061 Alloy, 31.8, 7°

Saddle

Fabric Scoop Shallow Sport, steel rails

Fabric Scoop Flat Elite, cro-mo rails

Seatpost

Cannondale C3, 6061 Alloy, 27.2 x 350mm (S), 400mm (M-XL)

Cannondale 3, 7075 Alloy, 27.2 x 400mm

Wheels & tires

Hubs

(F) Lefty 60 / (R) Shimano MT400 12x148mm thru-axle

(F) Lefty 60 (R) Formula 12x148 w/ HG driver

Rims

WTB STX i23 TCS, 32h, tubeless ready

WTB STX i21 TCS, 28h, tubeless ready

Spokes

DT Swiss Competition

DT Swiss Champion

Front tire

Schwalbe Racing Ray Performance, 29 x 2.25”, Addix Compound, tubeless ready,

Schwalbe Racing Ray Performance 27.5/29 x 2.25”, Addix Compound, tubeless ready

Rear tire

Schwalbe Racing Ralph Performance, 29 x 2.25”, Addix Compound, tubeless ready

Schwalbe Racing Ralph Performance 27.5/29 x 2.25” rear, Addix compound, tubeless ready

Wheel size

29"

Geometry comparison

One selected size or frame position per bicycle, matching the comparison dropdown choices used when Print / PDF was opened.

Measurement	2021 Cannondale F-Si Carbon 4	2020 Cannondale F-Si Carbon 4
Selected size / position	M	MD (29“)
Reach	420 mm	420 mm
Stack	612 mm	612 mm
Effective top tube	606 mm	606 mm
Head-tube angle	69°	69°
Seat-tube angle	73.1°	73.1°
Seat tube	430 mm	430 mm
Head tube	101 mm	101 mm
Chainstay / rear center	427 mm	427 mm
Wheelbase	1110 mm	1110 mm
Bottom-bracket drop	62 mm	62 mm
Bottom-bracket height	308 mm	308 mm
Standover height	793 mm	793 mm
Fork offset / rake	55 mm	55 mm
Front center	691 mm	691 mm
Trail	82 mm	82 mm
Wheel size	29	—

Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on November 7, 2026.