Rear tire: 29×2.25.
Velopedia Bicycle Archive
2021 Cannondale F-Si Carbon 2
Original specifications: 29 wheels · geometry for 4 published sizes.
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At a glance
Archive #900004712- Model year
- 2021
- Category
- Mountain
- Sizes
- S, M, L, XL
- Colors
- Mercury (MRC)
- Geometry
- 4 manufacturer sizes
- In this record
- 21 specifications · archived image · geometry
Model history 3 other years
Browse other years
Compare side by side
Identification clues
2021 archived details
- Published colors
- Mercury (MRC)
- 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 Carbon, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset (29”), 50mm offset (27.5) |
Drivetrain
| Shifters | Shimano XT, 12-speed |
|---|---|
| Rear Derailleur | Shimano XTR |
| Crankset | HollowGram, BB30a, OPI SpideRing, 34T, Ai offset |
| Bottom Bracket | Cannondale Alloy PressFit30 |
| Rear Cogs | Shimano XT, 10-51, 12-speed |
| Chain | Shimano XT, 12-speed |
Brakes
| Brakes | Shimano XT hydraulic 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 |
| Stem | Cannondale 2, 6061 Alloy, 31.8, 7° |
| Saddle | Prologo Dimension NDR, Tirox rails |
| Seatpost | Cannondale 2, UD Carbon, 27.2 x 400mm |
Wheels & Tires
| Hubs | (F) HollowGram Lefty 60 / (R) HollowGram w/ DT Swiss Star Ratchet internals, 12x148mm |
|---|---|
| Rims | HollowGram 25, Superlight Hi-Impact Carbon, 28h, 25mm IW, tubeless ready |
| Spokes | HollowGram, 2.0/1.8/2.0, straight-pull |
| Front Tire | Schwalbe Racing Ray EVO, 29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready, |
| Rear Tire | Schwalbe Racing Ralph EVO, 29 x 2.25”, SnakeSkin, Addix Speed, 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 Deore CN-M6100 Chain Silver, 12 Speed, 126 Links
Replacement option
10-51, 12-speed

Shimano Deore CS-M6200 12-Speed Cassette Black, 10-51t, HG
Replacement option
29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready,

Vittoria Barzo G2.0 4C XC Trail 29in Tire Anthracite/Black, XC-Trail/TNT, 29x2.25
Replacement option
More parts (5)Fewer parts
29 x 2.25”, SnakeSkin, Addix Speed, tubeless ready

Shimano XTR M9250 Rear Derailleur One Color, SGS 12 speed,Top Normal
Specification match
UD Carbon, 27.2 x 400mm

Ritchey Comp 2-Bolt Seatpost Black, 27.2x400mm
Replacement option
Tirox rails
12-speed
Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.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 EVO, 29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready,
- Rear tire
- Schwalbe Racing Ralph EVO, 29 x 2.25”, SnakeSkin, Addix Speed, 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 Carbon, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset (29”), 50mm offset (27.5)
Suspension
Evaluate the suspension →Archived: Fork: Lefty Ocho Carbon, 100mm, Chamber Damper with remote lockout, OppO Spring System, tapered steerer, 55mm offset (29”), 50mm offset (27.5)
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano XT, 12-speed · Rear derailleur: Shimano XTR · Crankset: HollowGram, BB30a, OPI SpideRing, 34T, Ai offset · Bottom bracket: Cannondale Alloy PressFit30 · Rear cogs: Shimano XT, 10-51, 12-speed · Chain: Shimano XT, 12-speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano XT hydraulic disc, 160/160mm XT rotors
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29 · Rims: HollowGram 25, Superlight Hi-Impact Carbon, 28h, 25mm IW, tubeless ready · Hubs: (F) HollowGram Lefty 60 / (R) HollowGram w/ DT Swiss Star Ratchet internals, 12x148mm · Front tire: Schwalbe Racing Ray EVO, 29 x 2.25”, SnakeSkin, Addix Speedgrip, tubeless ready, · Rear tire: Schwalbe Racing Ralph EVO, 29 x 2.25”, SnakeSkin, Addix Speed, tubeless ready
Controls and contact points
Archived: 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 · Stem: Cannondale 2, 6061 Alloy, 31.8, 7° · Seatpost: Cannondale 2, UD Carbon, 27.2 x 400mm · Saddle: Prologo Dimension NDR, Tirox rails
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





