Bicycle comparison

Specification	2021 Cannondale F-Si Carbon 2	2020 Cannondale F-Si Carbon 2
Overview
Model year	2021	2020
Brand	Cannondale	Cannondale
Model	F-Si Carbon 2	F-Si Carbon 2
Bicycle type	Mountain	Mountain
Archive ID	900004712	900002992
Colors	Mercury (MRC)	Chameleon (CML)
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 Carbon, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset (29”), 50mm offset (27.5)	Lefty Ocho Carbon, 27.5/29”, 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 50/55mm offset
Fork material	—	Carbon
Drivetrain
Shifters	Shimano XT, 12-speed	Shimano XT, 12-speed
Rear derailleur	Shimano XTR	Shimano XTR, Shadow Plus
Crankset	HollowGram, BB30a, OPI SpideRing, 34T, Ai offset	HollowGram, BB30 w/X-Sync® SpideRing, 34T, Ai offset
Bottom bracket	Cannondale Alloy PressFit30	Cannondale Alloy PressFit30
Rear cogs	Shimano XT, 10-51, 12-speed	Shimano XT, 10-51, 12-speed
Chain	Shimano XT, 12-speed	Shimano XT, 12-speed
Pedals	—	Not Included
Brakes
Brakes	Shimano XT hydraulic disc, 160/160mm XT rotors	Shimano Deore XT Race disc, 160/160mm XT rotors
Cockpit & contact points
Headset	Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small only)	Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small only)
Handlebar	Cannondale 1 Flat, Carbon, 31.8mm, 9° back, 760mm	Cannondale 1 Flat, Carbon, 31.8mm, 9° backsweep, 760mm
Stem	Cannondale 2, 6061 Alloy, 31.8, 7°	Cannondale 1, 7075 Alloy, 1-1/8”, 31.8, 7°
Saddle	Prologo Dimension NDR, Tirox rails	Fabric Scoop Flat Race, titanium rails
Seatpost	Cannondale 2, UD Carbon, 27.2 x 400mm	Cannondale 2, 7075 Alloy, 31.6 x 400mm
Wheels & tires
Hubs	(F) HollowGram Lefty 60 / (R) HollowGram w/ DT Swiss Star Ratchet internals, 12x148mm	(F) Lefty 60 (R) Hollowgram w/ DT internals 12x148 w/ Micro Spline
Rims	HollowGram 25, Superlight Hi-Impact Carbon, 28h, 25mm IW, tubeless ready	HollowGram 23, Superlight Hi-Impact Carbon, tubeless ready, 28h, 23mm inner width
Spokes	HollowGram, 2.0/1.8/2.0, straight-pull	Formula Grand Forza
Front tire	Schwalbe Racing Ray EVO, 29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready,	Schwalbe Racing Ray 27.5/29 x 2.25”, Snake Skin, Addix Speedgrip Compound, tubeless ready
Rear tire	Schwalbe Racing Ralph EVO, 29 x 2.25”, SnakeSkin, Addix Speed, tubeless ready	Schwalbe Racing Ralph 27.5/29 x 2.25”, Snake Skin, Addix Speed Compound, tubeless ready
Wheel size	29	29"

Specification

2021 Cannondale F-Si Carbon 2

2020 Cannondale F-Si Carbon 2

Overview

Model year

2021

2020

Brand

Cannondale

Model

F-Si Carbon 2

Bicycle type

Mountain

Archive ID

900004712

900002992

Colors

Mercury (MRC)

Chameleon (CML)

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 Carbon, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset (29”), 50mm offset (27.5)

Lefty Ocho Carbon, 27.5/29”, 100mm, Chamber Damper with cable lockout, OppO Spring System, tapered steerer, 50/55mm offset

Fork material

—

Carbon

Drivetrain

Shifters

Shimano XT, 12-speed

Rear derailleur

Shimano XTR

Shimano XTR, Shadow Plus

Crankset

HollowGram, BB30a, OPI SpideRing, 34T, Ai offset

HollowGram, BB30 w/X-Sync® SpideRing, 34T, Ai offset

Bottom bracket

Cannondale Alloy PressFit30

Rear cogs

Shimano XT, 10-51, 12-speed

Chain

Shimano XT, 12-speed

Pedals

—

Not Included

Brakes

Shimano XT hydraulic disc, 160/160mm XT rotors

Shimano Deore XT Race disc, 160/160mm XT rotors

Cockpit & contact points

Headset

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

Handlebar

Cannondale 1 Flat, Carbon, 31.8mm, 9° back, 760mm

Cannondale 1 Flat, Carbon, 31.8mm, 9° backsweep, 760mm

Stem

Cannondale 2, 6061 Alloy, 31.8, 7°

Cannondale 1, 7075 Alloy, 1-1/8”, 31.8, 7°

Saddle

Prologo Dimension NDR, Tirox rails

Fabric Scoop Flat Race, titanium rails

Seatpost

Cannondale 2, UD Carbon, 27.2 x 400mm

Cannondale 2, 7075 Alloy, 31.6 x 400mm

Wheels & tires

Hubs

(F) HollowGram Lefty 60 / (R) HollowGram w/ DT Swiss Star Ratchet internals, 12x148mm

(F) Lefty 60 (R) Hollowgram w/ DT internals 12x148 w/ Micro Spline

Rims

HollowGram 25, Superlight Hi-Impact Carbon, 28h, 25mm IW, tubeless ready

HollowGram 23, Superlight Hi-Impact Carbon, tubeless ready, 28h, 23mm inner width

Spokes

HollowGram, 2.0/1.8/2.0, straight-pull

Formula Grand Forza

Front tire

Schwalbe Racing Ray EVO, 29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready,

Schwalbe Racing Ray 27.5/29 x 2.25”, Snake Skin, Addix Speedgrip Compound, tubeless ready

Rear tire

Schwalbe Racing Ralph EVO, 29 x 2.25”, SnakeSkin, Addix Speed, tubeless ready

Schwalbe Racing Ralph 27.5/29 x 2.25”, Snake Skin, Addix Speed 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 2	2020 Cannondale F-Si Carbon 2
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.