Velopedia Bicycle Archive
2018 Cannondale Synapse Carbon Disc Ultegra Di2
Original manufacturer specifications including 700c wheels, geometry for 6 published sizes.
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What Velopedia knows
- Model year
- 2018
- Category
- Road
- Sizes
- 48, 51, 54, 56, 58, 61
- Colors
- Ash Gray w/ Anthracite and Copper - Gloss (CPR)
- Geometry
- 6 manufacturer sizes · Geometry context
- Record coverage
- 24 preserved details · archived image · preserved geometry
- Archive ID
- 900002489
Frameset
| Frame Construction | NEW Synapse Disc, BallisTec Carbon, Di2 ready, SAVE PLUS, BB30a, flat mount, 12mm thru axle |
|---|---|
| Frame Material | Carbon |
| Fork | NEW Synapse Disc Asymmetric, SAVE PLUS, BallisTec Carbon, integrated crown race, size-specific design 44-48: 1 1/8” steerer, 60mm rake 51-54: 1-1/8” - 1-1/4” tapered steerer, 55mm rake 56-61: 1-1/8” - 1-3/8” tapered steerer, 45mm rake |
| Fork Material | Carbon |
Drivetrain
| Shifters | Shimano Ultegra Di2 R8070 hydro disc |
|---|---|
| Front Derailleur | Shimano Ultegra Di2 R8050, braze-on |
| Rear Derailleur | Shimano Ultegra Di2 R8050 GS |
| Crankset | Cannondale Si, BB30a, w/ FSA rings, 50/34 |
| Bottom Bracket | FSA BB30 Bearings |
| Rear Cogs | Shimano Ultegra R8000, 11-32, 11-speed |
| Chain | Shimano HG601, 11-speed |
| Pedals | N/A |
Brakes
| Brakes | Shimano Ultegra R8070 hydro disc, flat mount, 160/160mm |
|---|
Cockpit & Contact Points
| Headset | Synapse Si, 25mm carbon top cap |
|---|---|
| Handlebar | Cannondale C2 Compact, butted 2014 Alloy |
| Stem | Cannondale C2, 7050 Alloy, 31.8, 6 deg. |
| Saddle | Selle Royal Seta S1 |
| Seatpost | Cannondale C2, UD Carbon, 25.4x350mm (48-56) 400mm (58-61) |
Wheels & Tires
| Hubs | Mavic Aksium Disc, Centerlock, 100x12mm front, 142x12mm rear |
|---|---|
| Rims | Mavic Aksium Disc |
| Spokes | Mavic Aksium |
| Front Tire | Schwalbe Lugano, Folding, 700x28c |
| Rear Tire | Schwalbe Lugano, Folding, 700x28c |
| Wheel Size | 700c |
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 | 48 | 51 | 54 | 56 | 58 | 61 |
|---|---|---|---|---|---|---|
| Seat tube | 407 mm | 443 mm | 480 mm | 520 mm | 550 mm | 590 mm |
| Effective top tube | 517 mm | 531 mm | 547 mm | 561 mm | 579 mm | 604 mm |
| Head tube | 122 mm | 137 mm | 161 mm | 173 mm | 197 mm | 229 mm |
| Head-tube angle | 70.8° | 71.7° | 71.7° | 73° | 73° | 73° |
| Seat-tube angle | 74.6° | 74.3° | 73.9° | 73.5° | 73° | 72.5° |
| Chainstay / rear center | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm | 410 mm |
| Wheelbase | 996 mm | 994 mm | 1008 mm | 995 mm | 1009 mm | 1028 mm |
| Bottom-bracket drop | 75 mm | 75 mm | 73 mm | 73 mm | 70 mm | 70 mm |
| Bottom-bracket height | 270 mm | 270 mm | 272 mm | 272 mm | 275 mm | 275 mm |
| Reach | 371 mm | 377 mm | 382 mm | 386 mm | 393 mm | 402 mm |
| Stack | 530 mm | 550 mm | 570 mm | 590 mm | 610 mm | 640 mm |
| Standover height | 712 mm | 742 mm | 773 mm | 804 mm | 833 mm | 868 mm |
| Fork offset / rake | 60 mm | 55 mm | 55 mm | 45 mm | 45 mm | 45 mm |
| Front center | 598 mm | 596 mm | 609 mm | 596 mm | 609 mm | 627 mm |
| Trail | 56 mm | 56 mm | 56 mm | 58 mm | 58 mm | 58 mm |
Geometry source: Cannondale MY18 Dealer Book, PDF page 185 Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
48 geometry
Archive context: Its trail of 56 mm sits toward the lower-trail end. Its bottom-bracket drop of 75 mm sits toward the deeper-drop end. The head angle of 70.8° sits toward the slacker end.
Compared with 19 distinct road 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 48 geometry 51 geometry
Archive context: Its trail of 56 mm sits toward the lower-trail end. Its bottom-bracket drop of 75 mm sits toward the deeper-drop end. Its stack of 550 mm sits somewhat taller than typical.
Compared with 19 distinct road 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 51 geometry 54 geometry
Archive context: Its trail of 56 mm sits toward the lower-trail end. Its bottom-bracket drop of 73 mm sits toward the deeper-drop end. The head angle of 71.7° sits toward the slacker end.
Compared with 21 distinct road geometries in the Medium-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 54 geometry 56 geometry
Archive context: Its bottom-bracket drop of 73 mm sits toward the deeper-drop end. The head angle of 73° sits toward the steeper end. Its wheelbase of 995 mm sits toward the shorter end.
Compared with 13 distinct road geometries in the Large-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 56 geometry 58 geometry
Archive context: Its reach of 393 mm sits toward the shorter end. Its bottom-bracket drop of 70 mm sits toward the deeper-drop end. Its wheelbase of 1009 mm sits somewhat shorter than typical.
Compared with 13 distinct road geometries in the XL-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 58 geometry 61 geometry
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 61 geometry Parts & serviceability
Find replacement parts
Shimano HG601, 11-speed
Exact archived model
Shimano Ultegra R8000, 11-32, 11-speed
Interpreted as Shimano Ultegra · 11-speed Component family — verify exact version
Schwalbe Lugano, Folding, 700x28c
Named tire and published size
More qualified parts (6)
Shimano Ultegra R8070 hydro disc, flat mount, 160/160mm
Brake model identified — verify pad shape
FSA BB30 Bearings
Named archived component — verify dimensions
Selle Royal Seta S1
Named archived component — verify exact version
Shimano Ultegra Di2 R8050, braze-on
Interpreted as Shimano Ultegra · 11-speed · Di2 Component family — verify exact version
Shimano Ultegra Di2 R8050 GS
Interpreted as Shimano Ultegra · 11-speed · Di2 Component family — verify exact version
Shimano Ultegra Di2 R8070 hydro disc
Interpreted as Shimano Ultegra · 11-speed · Di2 Component family — verify exact version
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 →
- DrivetrainConfirm every shift-system battery charges, every shift control works and the derailleur moves cleanly across the cassette. Make sure the matching shift-system charger is included, then measure chain wear and inspect the cassette teeth.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.Check wheels and tires →
- Bottom bracketTurn the cranks slowly, feel for rough bearings and check for side-to-side play. Creaking under load deserves investigation but does not identify the source by itself.Inspect the bottom bracket and shell →
Bike-specific inspection checklist 18 checks based on 5 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 Synapse Carbon Disc Ultegra Di2 · Road · Published sizes: 48, 51, 54, 56, 58, 61
Frame and fork
Inspect the frame and fork →Archived: Frame: NEW Synapse Disc, BallisTec Carbon, Di2 ready, SAVE PLUS, BB30a, flat mount, 12mm thru axle · Fork: · Carbon
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Ultegra Di2 R8070 hydro disc · Front derailleur: Shimano Ultegra Di2 R8050, braze-on · Rear derailleur: Shimano Ultegra Di2 R8050 GS · Crankset: Cannondale Si, BB30a, w/ FSA rings, 50/34 · Bottom bracket: FSA BB30 Bearings · Rear cogs: Shimano Ultegra R8000, 11-32, 11-speed · Chain: Shimano HG601, 11-speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano Ultegra R8070 hydro disc, flat mount, 160/160mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c · Rims: Mavic Aksium Disc · Hubs: Mavic Aksium Disc, Centerlock, 100x12mm front, 142x12mm rear · Front tire: Schwalbe Lugano, Folding, 700x28c · Rear tire: Schwalbe Lugano, Folding, 700x28c
Controls and contact points
Archived: Headset: Synapse Si, 25mm carbon top cap · Handlebar: Cannondale C2 Compact, butted 2014 Alloy · Stem: Cannondale C2, 7050 Alloy, 31.8, 6 deg. · Seatpost: Cannondale C2, UD Carbon, 25.4x350mm (48-56) 400mm (58-61) · Saddle: Selle Royal Seta S1
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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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.