Velopedia Bicycle Archive

2018 Cannondale Scalpel-Si Carbon 4

Original manufacturer specifications including 29" wheels, geometry for 4 published sizes.

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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

Manufacturer catalog

Published sizes and colors

4 sizes · 1 color

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

S (27.5")M (29")L (29")XL (29")

Published colors

Acid Green w/ Anthracite and Jet Black - Gloss (AGR)

Frameset

Frame ConstructionScalpel-Si, 100mm, BallisTec Carbon, Zero Pivot seatstay, Carbon Link, PF30, 1.5 Si head tube, Ai Offset
Frame MaterialCarbon
ForkLefty 2.0 Alloy OPI, 2Spring, 100mm, XLR Isolated Damper Technology with XC+ tune and XLoc remote, 55mm offset (29), 50mm offset (27.5)
Fork MaterialAluminum
Rear ShockRockShox Monarch RL, 100mm

Drivetrain

ShiftersShimano XT, 2x11
Front DerailleurShimano XT, side swing
Rear DerailleurShimano XT Shadow Plus, 11-speed
CranksetCannondale Si, BB30, 36/26 CNC Rings
Bottom BracketCannondale Alloy PressFit30
Rear CogsShimano XT, 11-42, 11-speed
ChainShimano HG601, 11-speed
PedalsN/A

Brakes

BrakesShimano XT hydro disc, 160/160mm

Cockpit & Contact Points

HeadsetCannondale HeadShok Si
HandlebarCannondale C2 flat, Butted AL2014 Alloy, 760mm
StemCannondale C1, 6061 Alloy, 1.5”, 31.8, -5°
SaddlePrologo Zero II STN
SeatpostCannondale C3, Micro Adjust, 6061 Alloy, 31.6x350mm (XS,S,M) 400mm (L,X)

Wheels & Tires

HubsLefty 60 front, Formula DHT-142x12, (Ai Offset dish - Rear)
RimsStan’s NoTubes Crest S1, 32 hole, tubeless ready
SpokesDT Swiss Competition (Ai Offset dish - Rear)
Front TireSchwalbe Racing Ralph Performance, 29x2.25”, folding
Rear TireSchwalbe Racing Ralph Performance, 29x2.25”, folding
Wheel Size29"

Size-specific frame data

Geometry

4 sizes · 15 measurements

Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.

MeasurementS (27.5")M (29")L (29")XL (29")
Seat tube400 mm440 mm480 mm520 mm
Effective top tube570 mm599 mm624 mm648 mm
Head tube97 mm110 mm122 mm134 mm
Head-tube angle69.5°69.5°69.5°69.5°
Seat-tube angle73.5°73.5°73.5°73.5°
Chainstay / rear center425 mm435 mm435 mm435 mm
Wheelbase1079 mm1118 mm1144 mm1169 mm
Bottom-bracket drop20 mm38 mm38 mm38 mm
Bottom-bracket height333 mm334 mm334 mm334 mm
Reach407 mm424 mm445 mm466 mm
Stack550 mm592 mm604 mm615 mm
Standover height716 mm754 mm760 mm766 mm
Fork offset / rake50 mm55 mm55 mm55 mm
Front center653 mm685 mm711 mm735 mm
Trail75 mm77 mm77 mm77 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

Choose a 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.
Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S (27.5") geometry

Parts & serviceability

Find replacement parts

3 top part searches
ChainExact archived part
Shimano HG601, 11-speed Exact archived model
Cassette / rear cogsMatching configuration
Shimano XT, 11-42, 11-speed Interpreted as Shimano Deore XT · 11-speed Component family — verify exact version
Front tireExact archived part
Schwalbe Racing Ralph Performance, 29x2.25”, folding Named tire and published size
More qualified parts (6)
SaddleQualified part search
Prologo Zero II STN Named archived component — verify exact version
Front derailleurOne check needed
Shimano XT, side swing Interpreted as Shimano Deore XT · 11-speed Named component · published drivetrain speed — verify exact version Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Rear derailleurMatching configuration
Shimano XT Shadow Plus, 11-speed Interpreted as Shimano Deore XT · 11-speed Component family — verify exact version Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
ShiftersOne check needed
Shimano XT, 2x11 Interpreted as Shimano Deore XT · 11-speed Component family — verify exact version Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
SeatpostMatching fit standard
31.6 mm seatpost Published diameter — verify length and setback
HubsQualified part search
Lefty 60 front, Formula DHT-142x12, (Ai Offset dish - Rear) Named archived component — verify dimensions

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
0 of 23 checked Progress stays in this browser for this bike.

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.

Archived: 2018 Cannondale Scalpel-Si Carbon 4 · Mountain · Published sizes: S (27.5"), M (29"), L (29"), XL (29")

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

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

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

Archived: Brakes: Shimano XT hydro disc, 160/160mm

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.

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Recently checked marketplace data

Market Snapshot

Checked Sep 28, 2026 2:16 pm

Velopedia did not find a close used eBay listing in the latest snapshot. New and used listings remain separate.

Evidence standard Fixed-price and Best Offer item prices only Shipping and tax excluded Active asks, not completed sales
No close current matches found. Velopedia did not find an eBay listing confident enough to include in the latest snapshot.

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.

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