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Cannondale

2026 Cannondale Synapse Carbon 4

2026 Cannondale Synapse Carbon 4

$5,999.99
$5,999.99
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Road Reimagined
Go long, go short, go fast. This is WorldTour performance for real world rides.

Wireless brains meet all-road brawn. Synapse Carbon 4 runs Shimano 105 Di2 for a shifting experience that feels straight off the pro tour, minus the bank loan. The frame delivers that signature Synapse ride—quietly fast, endlessly composed—and plays nice with wide tires, fenders, and long days. Call it the sweet spot between Sunday speed and weekday practicality.

What it's for
Comfortable high-performance road riding, long distance missions, fast group rides

Highlights

  • Lightweight, smoothly compliant, sleekly aero Synapse carbon frameset with StashPort downtube storage

  • Shimano 105 Di2 – Impressively smooth shifting from Shimano's journeyman electronic 2x12-speed drivetrain

  • DT Swiss 470 rims with Vittoria Rubino Pro IV 32c tires - grip, durability, and speed

  • Cannondale C1 Aero 27 Carbon seatpost - speed meets comfort

  • Fizik Vento Argo R5 saddle - ergonomic comfort with pressure relieving cutout



Features

  • Real World Performance: Designed to go fast, built to go long, and made to keep you comfortable, the Synapse redefines road performance. With a lightweight frame featuring wind-tunnel-sculpted tubing and PB-blasting stiffness-to-weight, it’s a bike that’s ready for anything you demand of it. Just ask Lachlan Morton why he trusted it for his record-smashing lap of Australia. Unreal speed, engineered for real-world roads.​

  • Compliant Comfort: With advancements in our carbon layup, our engineers have made the new Synapse 20% more compliant than its already butter-smooth predecessor, ensuring you feel 100% more comfortable even on the roughest roads.

  • Like A Glove: A great fit and feel makes for a great ride. And with our Proportional Response Construction, every rider gets that as standard. From the carbon layup through to the geometry, everything on Synapse has been tuned and tested by frame size. So that your bike works in harmony with you to give the best possible ride for you and your height.

  • Bring it all, bring it on: Cannondale's all-new StashPort storage system in the downtube is there when you need it and hidden when you don’t. Paired with its StashBag buddy, you can bring along your ride essentials and know that they’ll be secure, whatever you get up to out there. Meanwhile, best-in-class tire clearance lets you take the idea of riding for longer to a whole new level.

  • Big Ride Rubber: Best-in-class clearance for tyres with a maximum measured width of up to 48mm in the front and 42mm in the rear - with at least 4mm of extra clearance on each side - makes Synapse a true, ride-longer, ride-whatever kind of road bike.

  • StashPort + StashBag: StashPort is Cannondale's take on a downtube storage system, accessed beneath the water bottle cage. While every Synapse includes StashBag, a specially designed bag for tools and other ride essentials.

  • D-Lightful: The D-shaped design of Synapse’s seatpost enhances aerodynamics and boosts vertical compliance. Reducing muscle fatigue so that you stay fresher on those longer days.

  • Fly Delta: The unique-to-Cannondale v-shape Delta Steerer keeps your cockpit tidy and cables routed internally. While the reduced headtube frontal area brings aero gains to the party. As well as sleeker good looks.

Frameset

Frame Synapse Carbon, Proportional Response construction, integrated cable routing, downtube Stashport, 12x142 thru-axle, UDH, BSA 68mm threaded BB, flat mount disc, integrated seat binder, SmartSense Gen 2.0 compatible, fender mounts
Fork Synapse Carbon, integrated crown race, 12x100mm thru-axle, flat mount disc, internal routing, 1-1/8" to 1-1/5" Delta steerer, 55mm offset, fender mounts
Headset Integrated, 1-1/8" - 1-1/2"

Drivetrain

Rear Derailleur Shimano 105 Di2 7150
Front Derailleur Shimano 105 Di2 7150, braze-on
Shifters Shimano 105 Di2 R7170, wireless, 12-speed
Chain Shimano 105 7100, 12-speed
Crank Shimano 105 7100, BSA, 50/34 - 165mm (44cm), 170mm (48-51cm), 172.5 (54-56cm), 175mm (58-61)
Rear Cogs Shimano 105 7100, 11-34, 12-speed
Bottom Bracket Shimano BSA 68

Brakes

Brakes Shimano 105 7170 hydraulic disc, 160/160mm RT70 rotors
Brake Levers Shimano 105 Di2 7170 hydraulic disc

Wheels

Rims DT Swiss R470 DB, 28h
Spokes Stainless Steel, 14g
Tyre Size 32
Wheel Size 700c
Hubs (F) Shimano RS470, 12x100mm centerlock / (R) Shimano RS470, 12x142mm centerlock
Tyres Vittoria Rubino Pro IV, 700x32c

Components

Handlebar Vision Trimax Aero Alloy - 400mm (44-51cm), 420mm (54-61cm)
Stem Cannondale C1 Conceal, Alloy, 31.8, -6° 80mm (44-48m), 90mm (51cm), 100mm (54-56cm), 110mm (58-61cm)
Grips Cannondale Bar Tape, 3.5mm
Saddle Fizik Vento Argo X5, 140mm
Seatpost Cannondale C1 Aero 27 Carbon, SmartSense compatible, 330mm length, 0mm offset (44-48cm), 15mm offset (51-61cm)

Other

Accessories Large StashBag downtube storage bag

Specifications subject to change without notice.

Size Guide
Geometry Image 1