7.2–32.7 mph at 90 rpm, estimated from the published rear tire size 700×30c · 30-622 ETRTO.
Velopedia Bicycle Archive
2018 Cannondale Synapse Carbon Disc Ultegra SE
Original specifications: 700c wheels · geometry for 6 published sizes.
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At a glance
- Model year
- 2018
- Category
- Road
- Sizes
- 48, 51, 54, 56, 58, 61
- Colors
- Stealth Gray w/ Transparent Black - Gloss (SGY)
- Geometry
- 6 manufacturer sizes
- In this record
- 23 specifications · archived image · geometry
- Archive ID
- 900002520
Original buildCarbon · 700c
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 R8020 hydro disc |
|---|---|
| Front Derailleur | Shimano Ultegra R8000, braze-on |
| Rear Derailleur | Shimano Ultegra R8000 GS |
| Crankset | HollowGram Si, BB30a, w/ OPI SpideRing 50/34 |
| Bottom Bracket | FSA BB30 Bearings |
| Rear Cogs | Shimano Ultegra R8000, 11-34, 11-speed |
| Chain | Shimano HG601, 11-speed |
Brakes
| Brakes | Shimano Ultegra R8020 hydro disc, flat mount, 160/140mm |
|---|
Cockpit & Contact Points
| Headset | Synapse Si, 25mm carbon top cap |
|---|---|
| Handlebar | Cannondale C1 Ultralight Alloy Handlebar |
| Stem | Cannondale SAVE System |
| Saddle | Fabric Scoop Radius Elite |
| Seatpost | Cannondale SAVE Carbon, 25.4x350mm (44-56), 400mm (58-61) |
Wheels & Tires
| Hubs | Formula CL-712 front, RXC-142 Rear |
|---|---|
| Rims | WTB KOM i21 TCS 28-hole |
| Spokes | Double butted, Stainless steel, 2.0/1.8/2.0mm |
| Front Tire | WTB Exposure, 700x30c, tubeless, gumwall |
| Rear Tire | WTB Exposure, 700x30c, tubeless, gumwall |
| Wheel Size | 700c |
Geometry
Frame measurements by size.
Published frame view
Select an available measurement to locate it on the frame.
All geometry measurements6 sizes · 15 measurements
| 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 |
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

Shimano Ultegra CS-HG800 11-Speed Cassette Gray, 11x34
11x34

Vittoria Corsa Pro Control G2.0 Tubeless Tire Set Gumwall/Black, 700x30
700x30
Replacement option · verify fit

Challenge Strada Bianca Pro Tubeless Tire Tan, 700x30
700x30
Replacement option · verify fit
More parts (6)
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 19 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 SE · 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 R8020 hydro disc · Front derailleur: Shimano Ultegra R8000, braze-on · Rear derailleur: Shimano Ultegra R8000 GS · Crankset: HollowGram Si, BB30a, w/ OPI SpideRing 50/34 · Bottom bracket: FSA BB30 Bearings · Rear cogs: Shimano Ultegra R8000, 11-34, 11-speed · Chain: Shimano HG601, 11-speed
Brakes
Inspect the brakes →Archived: Brakes: Shimano Ultegra R8020 hydro disc, flat mount, 160/140mm
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c · Rims: WTB KOM i21 TCS 28-hole · Hubs: Formula CL-712 front, RXC-142 Rear · Front tire: WTB Exposure, 700x30c, tubeless, gumwall · Rear tire: WTB Exposure, 700x30c, tubeless, gumwall
Controls and contact points
Archived: Headset: Synapse Si, 25mm carbon top cap · Handlebar: Cannondale C1 Ultralight Alloy Handlebar · Stem: Cannondale SAVE System · Seatpost: Cannondale SAVE Carbon, 25.4x350mm (44-56), 400mm (58-61) · Saddle: Fabric Scoop Radius Elite
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.





