Rear tire: 29×2.25.
Velopedia Bicycle Archive
2021 Cannondale F-Si Carbon 3
Original specifications: 29 wheels · geometry for 4 published sizes.
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At a glance
Archive #900004707- Model year
- 2021
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Black Pearl (BPL)
- Geometry
- 4 manufacturer sizes
- In this record
- 22 specifications · archived image · geometry
Model history 3 other years
Browse other years
Compare side by side
Identification clues
2021 archived details
- Published colors
- Black Pearl (BPL)
- Frame
- Carbon
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildCarbon · 29
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 |
Drivetrain
| Shifters | Shimano SLX, 12-speed |
|---|---|
| Rear Derailleur | Shimano XT |
| Crankset | HollowGram, BB30a, OPI SpideRing, 34T |
| Bottom Bracket | Cannondale Alloy PressFit30 |
| Rear Cogs | Shimano SLX, 10-51, 12-speed |
| Chain | Shimano SLX, 12-speed |
| Pedals | Not included |
Brakes
| Brakes | Shimano Deore hydraulic 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) |
|---|---|
| Handlebar | Cannondale 2 Flat, butted 2014 Alloy, 31.8mm, 3° rise, 8° sweep, 760mm |
| Stem | Cannondale 3, 6061 Alloy, 31.8, 7° |
| Saddle | Fabric Scoop Shallow Elite, cro-mo rails |
| Seatpost | Cannondale 2, Carbon, 27.2 x 400mm, 0mm offset |
Wheels & Tires
| Hubs | (F) Lefty 60 / (R) Shimano SLX, 12x148mm thru-axle |
|---|---|
| Rims | Stan’s NoTubes Crest MK3, 28h, tubeless ready |
| Spokes | DT Swiss Competition |
| Front Tire | Schwalbe Racing Ray Performance, 29 x 2.25”, Addix Compound, tubeless ready, |
| Rear Tire | Schwalbe Racing Ralph Performance, 29 x 2.25”, Addix Compound, tubeless ready |
| Wheel Size | 29 |
No specifications match. Try a component name or clear your search.
Geometry
Frame measurements by size.
Frame diagram
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 16 measurements
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 380 mm | 430 mm | 480 mm | 530 mm |
| Effective top tube | 583 mm | 606 mm | 629 mm | 653 mm |
| Head tube | 90 mm | 101 mm | 113 mm | 126 mm |
| Head-tube angle | 69° | 69° | 69° | 69° |
| Seat-tube angle | 73.1° | 73.1° | 73.1° | 73.1° |
| Chainstay / rear center | 427 mm | 427 mm | 427 mm | 427 mm |
| Wheelbase | 1086 mm | 1110 mm | 1134 mm | 1159 mm |
| Bottom-bracket drop | 62 mm | 62 mm | 62 mm | 62 mm |
| Bottom-bracket height | 308 mm | 308 mm | 308 mm | 308 mm |
| Reach | 400 mm | 420 mm | 440 mm | 460 mm |
| Stack | 602 mm | 612 mm | 623 mm | 635 mm |
| Standover height | 755 mm | 793 mm | 828 mm | 863 mm |
| Fork offset / rake | 55 mm | 55 mm | 55 mm | 55 mm |
| Front center | 667 mm | 691 mm | 714 mm | 739 mm |
| Trail | 82 mm | 82 mm | 82 mm | 82 mm |
| Wheel size | 29 | 29 | 29 | 29 |
Dimensions as recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM = pedal turns per minute.
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 your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts
12-speed

Shimano SLX CN-M7100 12-Speed Chain Silver, 126 Links
Specification match
29 x 2.25”, Addix Compound, tubeless ready,

Vittoria Barzo G2.0 4C XC Trail 29in Tire Anthracite/Black, XC-Trail/TNT, 29x2.25
Replacement option
29 x 2.25”, Addix Compound, tubeless ready

Schwalbe Racing Ralph Performance Tubeless Tire - 29in Black, TwinSkin Addix, 29x2.25in
Model match
More parts (5)Fewer parts
Carbon, 27.2 x 400mm, 0mm offset

Zipp Service Course SL C2 Seatpost Black/0mm Setback, 27.2x400mm
Replacement option
10-51, 12-speed
cro-mo rails
12-speed
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- Schwalbe Racing Ray Performance, 29 x 2.25”, Addix Compound, tubeless ready,
- Rear tire
- Schwalbe Racing Ralph Performance, 29 x 2.25”, Addix Compound, tubeless ready
- Drivetrain
- 12-speed
- Seatpost diameter
- 27.2 mm
- Bottom bracket / shell
- Cannondale Alloy PressFit30
Equipment inspection checks 12 checks based on 6 archived component groups Open equipment checksClose equipment checks
Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.
Full used-bike inspection guide →
Frame and fork
Inspect the frame and fork →Archived: Frame: BallisTec Carbon, SAVE, PF30-83, tapered head tube, Speed Release 12mm thru axle, Ai Offset · Fork: Lefty Ocho, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset
Suspension
Evaluate the suspension →Archived: Fork: Lefty Ocho, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano SLX, 12-speed · Rear derailleur: Shimano XT · Crankset: HollowGram, BB30a, OPI SpideRing, 34T · Bottom bracket: Cannondale Alloy PressFit30 · Rear cogs: Shimano SLX, 10-51, 12-speed · Chain: Shimano SLX, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano Deore hydraulic disc, 160/160mm RT66 rotors
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29 · Rims: Stan’s NoTubes Crest MK3, 28h, tubeless ready · Hubs: (F) Lefty 60 / (R) Shimano SLX, 12x148mm thru-axle · Front tire: Schwalbe Racing Ray Performance, 29 x 2.25”, Addix Compound, tubeless ready, · Rear tire: Schwalbe Racing Ralph Performance, 29 x 2.25”, Addix Compound, tubeless ready
Controls and contact points
Archived: Headset: Integrated, 1-1/8 to 1.5”, sealed angular contact bearings (Integrated steer stop size small and extra small only) · Handlebar: Cannondale 2 Flat, butted 2014 Alloy, 31.8mm, 3° rise, 8° sweep, 760mm · Stem: Cannondale 3, 6061 Alloy, 31.8, 7° · Seatpost: Cannondale 2, Carbon, 27.2 x 400mm, 0mm offset · Saddle: Fabric Scoop Shallow Elite, cro-mo rails · Pedals: Not included
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





