Velopedia Bicycle Archive

Compare Bicycles

Compare published geometry, gearing and specifications for up to three bicycles.

1 of 2 bicycles

At a glance

Key differences

Supported differences are shown below. Data limitations are labeled separately.

  1. Data limitation

    No geometry is recorded for 2015 Cannondale F-SI CARBON 2.

  2. Gearing

    2021 Cannondale F-Si Carbon 2 has a 12% lower climbing ratio than 2015 Cannondale F-SI CARBON 2.

    A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.

Selected-size geometry

Geometry overlay

Frames share one scale and a bottom-bracket alignment. Size labels differ by brand; schematic drawing aids are identified below.

Gearing comparison

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

2021 Cannondale F-Si Carbon 2Size M · 34T · 10–51T · 12-speed
Lowest0.67:1Highest3.40:1Total range510%
Estimated speed at 90 RPMLowest gear5.2 mphHighest gear26.4 mph

Rear tire: 29×2.25.

2015 Cannondale F-SI CARBON 232T · 10–42T · 11-speed
Lowest0.76:1Highest3.20:1Total range420%
Estimated speed at 90 RPMLowest gear5.9 mphHighest gear24.6 mph

Uses front tire 29×2.1; rear size isn’t listed.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
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Specification
2021 Cannondale F-Si Carbon 2
2015 Cannondale F-Si Carbon 2
Overview
Model Year
2021
2015
Brand
Cannondale
Cannondale
Model
F-Si Carbon 2
F-Si Carbon 2
Bicycle Type
Mountain
Mountain Hardtail
Original MSRP
Not documented
$4,870.00
Colors
Mercury (MRC)
Blue/Black
Sizes
S, M, L, XL
S, M, L, XL
Weight
—
—
Frameset
Frame Construction
BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset
F-Si Asymmetric, BallisTec Hi-MOD Carbon, SPEED SAVE, PF30A, 1.5 Si Head Tube
Frame Material
Carbon
Carbon Fiber
Fork
Lefty Ocho Carbon, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset (29”), 50mm offset (27.5)
Lefty 2.0 PBR 100 29, PBR XC damper, Hybrid Needle Bearing Technology, 55mm offset
Fork Material
—
Suspension
Drivetrain
Component Group
—
SRAM X01
Shifters
Shimano XT, 12-speed
SRAM X01, 11-speed, trigger
Front Derailleur
—
None
Rear Derailleur
Shimano XTR
SRAM X01, Type 2 RBC
Crankset
HollowGram, BB30a, OPI SpideRing, 34T, Ai offset
Cannondale HollowGram Si, Ai, BB30, XX1 32T
Bottom Bracket
Cannondale Alloy PressFit30
Cannondale Alloy PressFit30
Rear Cogs
Shimano XT, 10-51, 12-speed
SRAM X01, 10-42, 11-speed
Chain
Shimano XT, 12-speed
KMC X11, 11-speed
Brakes
Brakes
Shimano XT hydraulic disc, 160/160mm XT rotors
Magura MT4, Storm SL rotors 180/160mm
Cockpit & Contact Points
Headset
Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small only)
Cannondale HeadShok Si
Handlebar
Cannondale 1 Flat, Carbon, 31.8mm, 9° back, 760mm
Cannondale C1 flat, carbon, 700mm
Stem
Cannondale 2, 6061 Alloy, 31.8, 7°
Cannondale OPI Adjustable Stem/Steerer 2.0, 31.8, -5 deg
Saddle
Prologo Dimension NDR, Tirox rails
Fabric Scoop Pro, Titanium
Seatpost
Cannondale 2, UD Carbon, 27.2 x 400mm
Cannondale F-Si SAVE 2 Carbon, 27.2x400mm
Wheels & Tires
Hubs
(F) HollowGram Lefty 60 / (R) HollowGram w/ DT Swiss Star Ratchet internals, 12x148mm
Lefty SM front, Formula DCL-301 rear (Ai offset lacing)
Rims
HollowGram 25, Superlight Hi-Impact Carbon, 28h, 25mm IW, tubeless ready
Stan's ZTR Arch EX 29, 32 hole, tubeless ready (Ai offset lacing)
Spokes
HollowGram, 2.0/1.8/2.0, straight-pull
DT Swiss Competition (Ai offset lacing)
Front Tire
Schwalbe Racing Ray EVO, 29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready,
Schwalbe Racing Ralph EVO Snakeskin, 29x2.1", folding, tubeless ready
Rear Tire
Schwalbe Racing Ralph EVO, 29 x 2.25”, SnakeSkin, Addix Speed, tubeless ready
—
Wheel Size
29
29
Geometry · choose a size for each bicycle
Geometry size
—
Reach
420 mm
—
Stack
612 mm
—
Effective top tube
606 mm
—
Head-tube angle
69°
—
Seat-tube angle
73.1°
—
Seat tube
430 mm
—
Head tube
101 mm
—
Chainstay / rear center
427 mm
—
Wheelbase
1110 mm
—
Bottom-bracket drop
62 mm
—
Bottom-bracket height
308 mm
—
Standover height
793 mm
—
Fork offset / rake
55 mm
—
Front center
691 mm
—
Trail
82 mm
—
Wheel size
29
—

Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.

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