Velopedia Bicycle Archive
2018 Cannondale Scalpel-Si Carbon 3
Original specifications: 29" wheels · geometry for 4 published sizes.
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At a glance
- Model year
- 2018
- Category
- Mountain
- Sizes
- S (27.5"), M (29"), L (29"), XL (29")
- Colors
- Jet Black w/ Nearly Black and Charcoal Gray - Matte (BBQ)
- Geometry
- 4 manufacturer sizes
- In this record
- 23 specifications · archived image · geometry
- Archive ID
- 900002669
Original buildCarbon · 29"
Frameset
| Frame Construction | Scalpel-Si, 100mm, BallisTec Carbon, Zero Pivot seatstay, Carbon Link, PF30, 1.5 Si head tube, Ai Offset |
|---|---|
| Frame Material | Carbon |
| Fork | Lefty 2.0 Carbon, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc Full Sprint remote, 55mm offset (29), 50mm offset (27.5) |
| Fork Material | Carbon |
| Rear Shock | RockShox Monarch XX, 100mm, Full Sprint remote |
Drivetrain
| Shifters | Shimano XT, 11-speed |
|---|---|
| Rear Derailleur | Shimano XTR Shadow Plus, 11-speed |
| Crankset | Cannondale HollowGram Si, BB30 w/ Ai SpideRing, X-Sync®, 32t |
| Bottom Bracket | Cannondale Alloy PressFit30 |
| Rear Cogs | Shimano XT, 11-46, 11-speed |
| Chain | Shimano HG601, 11-speed |
Brakes
| Brakes | Shimano XT hydro disc, 160/160mm |
|---|
Cockpit & Contact Points
| Headset | Cannondale HeadShok Si |
|---|---|
| Handlebar | Cannondale C1 flat, Carbon, 760mm |
| Stem | Cannondale C1, 7075 Alloy, 31.8, -5° |
| Saddle | Prologo Zero II STN |
| Seatpost | Cannondale C2 Carbon, Micro Adjust, 31.6x350mm (XS,S,M) 400mm (L,X) |
Wheels & Tires
| Hubs | C-Zero Straight Pull, Lefty 60 front, 39-point engagement rear, 142x12, 28h (Ai Offset dish - Rear) |
|---|---|
| Rims | Stan’s NoTubes CREST MK3, 32 hole, tubeless ready |
| Spokes | Grand Forza Double Butted (Ai Offset dish - Rear) |
| Front Tire | Schwalbe Racing Ralph EVO Snakeskin, 29x2.25”, folding, Tubeless Ready |
| Rear Tire | Schwalbe Racing Ralph EVO Snakeskin, 29x2.25”, folding, Tubeless Ready |
| Wheel Size | 29" |
Geometry
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
All geometry measurements4 sizes · 15 measurements
| Measurement | S (27.5") | M (29") | L (29") | XL (29") |
|---|---|---|---|---|
| Seat tube | 400 mm | 440 mm | 480 mm | 520 mm |
| Effective top tube | 570 mm | 599 mm | 624 mm | 648 mm |
| Head tube | 97 mm | 110 mm | 122 mm | 134 mm |
| Head-tube angle | 69.5° | 69.5° | 69.5° | 69.5° |
| Seat-tube angle | 73.5° | 73.5° | 73.5° | 73.5° |
| Chainstay / rear center | 425 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1079 mm | 1118 mm | 1144 mm | 1169 mm |
| Bottom-bracket drop | 20 mm | 38 mm | 38 mm | 38 mm |
| Bottom-bracket height | 333 mm | 334 mm | 334 mm | 334 mm |
| Reach | 407 mm | 424 mm | 445 mm | 466 mm |
| Stack | 550 mm | 592 mm | 604 mm | 615 mm |
| Standover height | 716 mm | 754 mm | 760 mm | 766 mm |
| Fork offset / rake | 50 mm | 55 mm | 55 mm | 55 mm |
| Front center | 653 mm | 685 mm | 711 mm | 735 mm |
| Trail | 75 mm | 77 mm | 77 mm | 77 mm |
Measurements may vary by configuration, wheel size, or frame setting where noted in the published chart.
Gearing
Lower ratios provide more mechanical advantage for climbing. Higher ratios turn the rear wheel farther with each crank revolution.
Parts & serviceability
Find replacement parts

Shimano SLX/105 CN-HG601 11-Speed Chain Grey, 126 Links
126 Links

Schwalbe Magic Mary Evolution Tubeless Tire - 29in Black, Addix Soft Snakeskin, 29x2.25in
29x2.25in
Replacement option · verify fit
More parts (4)

Zipp Service Course B2 Seatpost Black/0mm Setback, 31.6x350mm
31.6x350mm
Replacement option · verify fit
Based on the original build. Confirm the model, size and fit before ordering; installed parts may differ. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases.
Bike-specific inspection checklist 23 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2018 Cannondale Scalpel-Si Carbon 3 · Mountain · Published sizes: S (27.5"), M (29"), L (29"), XL (29")
Frame and fork
Inspect the frame and fork →Archived: Frame: Scalpel-Si, 100mm, BallisTec Carbon, Zero Pivot seatstay, Carbon Link, PF30, 1.5 Si head tube, Ai Offset · Fork: Lefty 2.0 Carbon, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc Full Sprint remote, 55mm offset (29), 50mm offset (27.5) · Carbon
Suspension
Evaluate the suspension →Archived: Fork: Lefty 2.0 Carbon, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc Full Sprint remote, 55mm offset (29), 50mm offset (27.5) · Rear shock: RockShox Monarch XX, 100mm, Full Sprint remote
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano XT, 11-speed · Rear derailleur: Shimano XTR Shadow Plus, 11-speed · Crankset: Cannondale HollowGram Si, BB30 w/ Ai SpideRing, X-Sync®, 32t · Bottom bracket: Cannondale Alloy PressFit30 · Rear cogs: Shimano XT, 11-46, 11-speed · Chain: Shimano HG601, 11-speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano XT hydro disc, 160/160mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 29" · Rims: Stan’s NoTubes CREST MK3, 32 hole, tubeless ready · Hubs: C-Zero Straight Pull, Lefty 60 front, 39-point engagement rear, 142x12, 28h (Ai Offset dish - Rear) · Front tire: Schwalbe Racing Ralph EVO Snakeskin, 29x2.25”, folding, Tubeless Ready · Rear tire: Schwalbe Racing Ralph EVO Snakeskin, 29x2.25”, folding, Tubeless Ready
Controls and contact points
Archived: Headset: Cannondale HeadShok Si · Handlebar: Cannondale C1 flat, Carbon, 760mm · Stem: Cannondale C1, 7075 Alloy, 31.8, -5° · Seatpost: Cannondale C2 Carbon, Micro Adjust, 31.6x350mm (XS,S,M) 400mm (L,X) · Saddle: Prologo Zero II STN
Before and during the test ride
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

