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2018 Cannondale Scalpel-Si 5

Original specifications: 29" wheels · geometry for 4 published sizes.

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At a glance

Archive #900002709
Model year
2018
Category
Mountain
Sizes
S (27.5"), M (29"), L (29"), XL (29")
Colors
Matte Jet Black w/ Gloss Jet Black and Ultra Blue - Matte (BLK)
Geometry
4 manufacturer sizes
In this record
24 specifications · archived image · geometry
Model history 1 other year

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Identification clues

2018 archived details

Published colors
Matte Jet Black w/ Gloss Jet Black and Ultra Blue - Matte (BLK)
Frame
Carbon

Clues, not proof of model year. Colors vary and components may have been replaced.

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Original buildCarbon · 29"

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

Matte Jet Black w/ Gloss Jet Black and Ultra Blue - Matte (BLK)

Frameset

Frame ConstructionScalpel-Si, 100mm, SmartForm C1 Alloy, Zero Pivot seatstay, Carbon Link, PF30, 1.5 Si head tube, Ai Offset
Frame MaterialCarbon
ForkLefty 2.0 Alloy OPI, 2Spring, 100mm, PBR Isolated Damper Technology with XC+ tune and updated controls, 55mm offset (29), 50mm offset (27.5)
Fork MaterialAluminum
Rear ShockRockShox Monarch RL, 100mm

Drivetrain

ShiftersSRAM S Series, 2x11
Front DerailleurShimano XT, side swing
Rear DerailleurSRAM GX, 11-speed
CranksetCannondale Si, BB30, 36/26 CNC Rings
Bottom BracketCannondale Alloy PressFit30
Rear CogsSRAM PG-1130, 11-speed, 11-42
ChainSRAM 11-speed

Brakes

BrakesShimano Deore MT500 hydro disc, 180/160mm

Cockpit & Contact Points

HeadsetCannondale HeadShok Si
HandlebarCannondale C2 flat, Butted AL2014 Alloy, 760mm
StemCannondale C1, 6061 Alloy, 1.5”, 31.8, -5°
SaddlePrologo K3
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 Champion (Ai Offset dish - Rear)
Front TireSchwalbe Racing Ralph Performance, 29x2.25”, folding
Rear TireSchwalbe Racing Ralph Performance, 29x2.25”, folding
Wheel Size29"

Geometry

4 sizes · 15 measurements

Frame measurements by size.

All geometry measurements4 sizes · 15 measurements
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

Dimensions as recorded.

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

S (27.5")36/26T · 11–42T · 11-speed
Lowest0.62:1 Highest3.27:1 Total range529%

Speed unavailable: wheel or tire size is missing or unclear.

M (29"), L (29"), XL (29")36/26T · 11–42T · 11-speed
Lowest0.62:1 Highest3.27:1 Total range529%
Estimated speed At 90 RPM Lowest gear4.8 mph Highest gear25.4 mph

Rear tire: 29×2.25.

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 other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup
Gears

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Cassette / rear cogs · Original
SRAM PG-1130

11-speed, 11-42

Retailer offers
Front tire · Original
Schwalbe Racing Ralph Performance

29x2.25”, folding

Retailer offers
Rear derailleur · Original
SRAM GX

11-speed

Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Retailer offers
More parts (5)Fewer parts
Seatpost · Original
Cannondale C3

Micro Adjust, 6061 Alloy, 31.6x350mm (XS,S,M) 400mm (L,X)

Retailer offers
Saddle · Original
Prologo K3
Front derailleur · Original
Shimano XT

side swing

Before ordering: Confirm whether the drivetrain is mechanical or electronic before ordering.
Shifters · Original
SRAM S Series

2x11

Hubs · Original
Lefty 60 front

Formula DHT-142x12, (Ai Offset dish - Rear)

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.

Service essentialsQuick reference before buying parts

Archived specifications for reference. Check the fitted parts before ordering.

Front tire
Schwalbe Racing Ralph Performance, 29x2.25”, foldingCheck: Verify the fitted tire’s size marking and rim type.
Rear tire
Schwalbe Racing Ralph Performance, 29x2.25”, foldingCheck: Verify the rear size; it may differ from the front.
Drivetrain
11-speedCheck: Match the installed drivetrain family, not just its speed count.
Seatpost diameter
31.6 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
Bottom bracket / shell
Cannondale Alloy PressFit30Check: Verify shell type and width, crank interface, and spindle length or spacers.
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 record.

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 5 · Mountain · Published sizes: S (27.5"), M (29"), L (29"), XL (29")

Archived: Frame: Scalpel-Si, 100mm, SmartForm C1 Alloy, Zero Pivot seatstay, Carbon Link, PF30, 1.5 Si head tube, Ai Offset · Fork: Lefty 2.0 Alloy OPI, 2Spring, 100mm, PBR Isolated Damper Technology with XC+ tune and updated controls, 55mm offset (29), 50mm offset (27.5) · Aluminum

Archived: Fork: Lefty 2.0 Alloy OPI, 2Spring, 100mm, PBR Isolated Damper Technology with XC+ tune and updated controls, 55mm offset (29), 50mm offset (27.5) · Rear shock: RockShox Monarch RL, 100mm

Archived: Shifters: SRAM S Series, 2x11 · Front derailleur: Shimano XT, side swing · Rear derailleur: SRAM GX, 11-speed · Crankset: Cannondale Si, BB30, 36/26 CNC Rings · Bottom bracket: Cannondale Alloy PressFit30 · Rear cogs: SRAM PG-1130, 11-speed, 11-42 · Chain: SRAM 11-speed

Archived: Brakes: Shimano Deore MT500 hydro disc, 180/160mm

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 K3

Before and during the test ride

Follow the full used-bike inspection order →

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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.

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