
Velopedia Bicycle Archive
2018 Cannondale Scalpel-Si Carbon 4
Original manufacturer specifications including 29" wheels, geometry for 4 published sizes.
Selling this bike? Create a shareable bike record
What Velopedia knows
- Model year
- 2018
- Category
- Mountain
- Sizes
- S (27.5"), M (29"), L (29"), XL (29")
- Colors
- Acid Green w/ Anthracite and Jet Black - Gloss (AGR)
- Geometry
- 4 manufacturer sizes · Geometry context
- Record coverage
- 25 preserved details · archived image · preserved geometry
- Archive ID
- 900002477
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 Alloy OPI, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc remote, 55mm offset (29), 50mm offset (27.5) |
| Fork Material | Aluminum |
| Rear Shock | RockShox Monarch RL, 100mm |
Drivetrain
| Shifters | Shimano XT, 2x11 |
|---|---|
| Front Derailleur | Shimano XT, side swing |
| Rear Derailleur | Shimano XT Shadow Plus, 11-speed |
| Crankset | Cannondale Si, BB30, 36/26 CNC Rings |
| Bottom Bracket | Cannondale Alloy PressFit30 |
| Rear Cogs | Shimano XT, 11-42, 11-speed |
| Chain | Shimano HG601, 11-speed |
| Pedals | N/A |
Brakes
| Brakes | Shimano XT hydro disc, 160/160mm |
|---|
Cockpit & Contact Points
| Headset | Cannondale HeadShok Si |
|---|---|
| Handlebar | Cannondale C2 flat, Butted AL2014 Alloy, 760mm |
| Stem | Cannondale C1, 6061 Alloy, 1.5”, 31.8, -5° |
| Saddle | Prologo Zero II STN |
| Seatpost | Cannondale C3, Micro Adjust, 6061 Alloy, 31.6x350mm (XS,S,M) 400mm (L,X) |
Wheels & Tires
| Hubs | Lefty 60 front, Formula DHT-142x12, (Ai Offset dish - Rear) |
|---|---|
| Rims | Stan’s NoTubes Crest S1, 32 hole, tubeless ready |
| Spokes | DT Swiss Competition (Ai Offset dish - Rear) |
| Front Tire | Schwalbe Racing Ralph Performance, 29x2.25”, folding |
| Rear Tire | Schwalbe Racing Ralph Performance, 29x2.25”, folding |
| Wheel Size | 29" |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| 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 |
Geometry source: Cannondale MY18 Dealer Book, PDF page 183 Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
S (27.5") geometry
Archive context: Its stack of 550 mm sits toward the lower end. Its trail of 75 mm sits toward the lower-trail end. The head angle of 69.5° sits toward the steeper end.
Compared with 54 distinct mountain geometries in the Small-equivalent size cohort from model years 2016–2020 in the Velopedia archive.M (29") geometry
Archive context: Its trail of 77 mm sits toward the lower-trail end. The head angle of 69.5° sits toward the steeper end. Its stack of 592 mm sits toward the lower end.
Compared with 57 distinct mountain geometries in the Medium-equivalent size cohort from model years 2016–2020 in the Velopedia archive.L (29") geometry
Archive context: Its trail of 77 mm sits toward the lower-trail end. The head angle of 69.5° sits toward the steeper end. Its stack of 604 mm sits toward the lower end.
Compared with 55 distinct mountain geometries in the Large-equivalent size cohort from model years 2016–2020 in the Velopedia archive.XL (29") geometry
Archive context: Its trail of 77 mm sits toward the lower-trail end. The head angle of 69.5° sits toward the steeper end. Its stack of 615 mm sits toward the lower end.
Compared with 51 distinct mountain geometries in the XL-equivalent size cohort from model years 2016–2020 in the Velopedia archive.Parts & serviceability
Find replacement parts
More qualified parts (6)
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. 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. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameInspect the frame in bright light, especially around the head tube, bottom bracket, chainstays and clamped areas. Look for cracks, ripples, crushed sections or signs of a previous impact.Inspect the frame and fork →
- BrakesBoth brakes should stop firmly and release without rubbing. Inspect pad thickness, rotor wear and alignment, and check the cables or hoses for damage.Inspect the brakes →
- SuspensionAsk when the fork and shock were last serviced. Check the stanchions for damage, look for oil at the seals, cycle both units through their travel and test the suspension pivots for play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 11-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads. If it is set up tubeless, confirm both tires hold pressure and ask when the sealant was last refreshed.Check wheels and tires →
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 4 · 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 Alloy OPI, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc remote, 55mm offset (29), 50mm offset (27.5) · Aluminum
Suspension
Evaluate the suspension →Archived: Fork: Lefty 2.0 Alloy OPI, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc remote, 55mm offset (29), 50mm offset (27.5) · Rear shock: RockShox Monarch RL, 100mm
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano XT, 2x11 · Front derailleur: Shimano XT, side swing · Rear derailleur: Shimano XT Shadow Plus, 11-speed · Crankset: Cannondale Si, BB30, 36/26 CNC Rings · Bottom bracket: Cannondale Alloy PressFit30 · Rear cogs: Shimano XT, 11-42, 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 S1, 32 hole, tubeless ready · Hubs: Lefty 60 front, Formula DHT-142x12, (Ai Offset dish - Rear) · Front tire: Schwalbe Racing Ralph Performance, 29x2.25”, folding · Rear tire: Schwalbe Racing Ralph Performance, 29x2.25”, folding
Controls and contact points
Archived: Headset: Cannondale HeadShok Si · Handlebar: Cannondale C2 flat, Butted AL2014 Alloy, 760mm · Stem: Cannondale C1, 6061 Alloy, 1.5”, 31.8, -5° · Seatpost: Cannondale C3, Micro Adjust, 6061 Alloy, 31.6x350mm (XS,S,M) 400mm (L,X) · Saddle: Prologo Zero II STN
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
Have you owned this bike?Help preserve its real-world history by sharing your owner experience.
Share the details that would help another rider understand how this model fits, rides and holds up over time. Velopedia reviews every contribution before publication.
Already contributed? Send me a fresh private edit link
For privacy, Velopedia shows the same confirmation whether or not an experience exists.
Recently checked marketplace data
Market Snapshot
Velopedia did not find a close used eBay listing in the latest snapshot. New and used listings remain separate.
Listings shown have not passed their eBay-supplied end time. Velopedia rechecks matched bicycles on a protected weekly cycle; availability can still change between checks. Price calculations use active fixed-price and Best Offer item prices before shipping and tax. Auction bids, auction-only prices, classified ads, lower-confidence Review candidates and ended listings are excluded. These observations are not completed-sale prices, a certified appraisal or a guarantee of value.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




