Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Frame geometry
2021 Cannondale F-Si Carbon 3 has 6 mm more reach than 2018 Cannondale F-Si Carbon 3 in the selected sizes.
More reach puts the head-tube reference farther forward, not necessarily the hands.
- Handling
2021 Cannondale F-Si Carbon 3 has a 0.7° slacker head-tube angle than 2018 Cannondale F-Si Carbon 3 in the selected sizes.
Fork offset, tire size and wheelbase also affect steering; head angle alone is not a handling verdict.
- Gearing
2018 Cannondale F-Si Carbon 3 has a 7% lower climbing ratio than 2021 Cannondale F-Si Carbon 3.
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.
Lowest0.67:1Highest3.40:1Total range510%
Estimated speed at 90 RPMLowest gearHighest gear
Rear tire: 29×2.25.
Lowest0.62:1Highest3.27:1Total range529%
Speed unavailable: wheel or tire size is missing or unclear.
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.
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.
Specification
2021 Cannondale F-Si Carbon 3
2018 Cannondale F-Si Carbon 3
Overview
Model Year
2021
2018
Brand
Cannondale
Cannondale
Model
F-Si Carbon 3
F-Si Carbon 3
Bicycle Type
Mountain
Mountain
Colors
Black Pearl (BPL)
Nearly Black w/ Jet Black and Acid Red - Gloss (NBL)
Sizes
S, M, L, XL
S (27.5"), M (29"), L (29"), XL (29")
Weight
—
—
Frameset
Frame Construction
BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset
F-Si, BallisTec Carbon, SPEED SAVE, PF30A, 1.5 Si Head Tube, Ai Offset, 27.5” (S), 29” (M-XL)
Frame Material
Carbon
Carbon
Fork
Lefty Ocho, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset
Lefty 2.0 Alloy OPI, 2Spring, 100mm, PBR Isolated Damper Technology with XC+ tune, 55mm offset (29), 50mm offset (27.5)
Fork Material
—
Aluminum
Drivetrain
Shifters
Shimano SLX, 12-speed
Shimano XT, 2x11
Front Derailleur
—
Shimano XT, direct mount
Rear Derailleur
Shimano XT
Shimano XT, Shadow Plus, 11-speed
Crankset
HollowGram, BB30a, OPI SpideRing, 34T
Cannondale Si, Ai, BB30, FSA 26/36 rings
Bottom Bracket
Cannondale Alloy PressFit30
Cannondale Alloy PressFit30
Rear Cogs
Shimano SLX, 10-51, 12-speed
Shimano SLX , 11-42, 11-speed
Chain
Shimano SLX, 12-speed
Shimano CN-HG601, 11-speed
Pedals
Not included
—
Brakes
Brakes
Shimano Deore hydraulic disc, 160/160mm RT66 rotors
Magura MT-RACE w/ 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 and extra small only)
Cannondale HeadShok Si
Handlebar
Cannondale 2 Flat, butted 2014 Alloy, 31.8mm, 3° rise, 8° sweep, 760mm
Cannondale C2 flat, Butted AL2014 Alloy, 700mm
Stem
Cannondale 3, 6061 Alloy, 31.8, 7°
Cannondale C1, 6061 Alloy, 1.5”, 31.8, -5°
Saddle
Fabric Scoop Shallow Elite, cro-mo rails
Prologo Zero II STN Rail
Seatpost
Cannondale 2, Carbon, 27.2 x 400mm, 0mm offset
Cannondale C2, 7075 alloy, 27.2mm x 400mm
Wheels & Tires
Hubs
(F) Lefty 60 / (R) Shimano SLX, 12x148mm thru-axle
Lefty 60 front, Custom Formula 1702 Ai Offset dish - Rear
Rims
Stan’s NoTubes Crest MK3, 28h, tubeless ready
Stan’s NoTubes Crest MK3, Tubeless Ready
Spokes
DT Swiss Competition
DT-Swiss Competition (Ai Offset dish - Rear)
Front Tire
Schwalbe Racing Ray Performance, 29 x 2.25”, Addix Compound, tubeless ready,
Schwalbe Racing Ralph EVO Performance, 29/27.5x2.1”, Tubeless Ready
Rear Tire
Schwalbe Racing Ralph Performance, 29 x 2.25”, Addix Compound, tubeless ready
Schwalbe Racing Ralph EVO Performance, 29/27.5x2.1”, Tubeless Ready
Wheel Size
29
27.5"
Geometry · choose a size for each bicycle
Geometry size
Reach
420 mm
414 mm
Stack
612 mm
603 mm
Effective top tube
606 mm
596 mm
Head-tube angle
69°
69.7°
Seat-tube angle
73.1°
73.2°
Seat tube
430 mm
435 mm
Head tube
101 mm
97 mm
Chainstay / rear center
427 mm
429 mm
Wheelbase
1110 mm
1097 mm
Bottom-bracket drop
62 mm
62 mm
Bottom-bracket height
308 mm
308 mm
Standover height
793 mm
777 mm
Fork offset / rake
55 mm
55 mm
Front center
691 mm
676 mm
Trail
82 mm
78 mm
Wheel size
29
—
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.