The Cannondale Synapse Carbon 4 is an endurance road bike made for riders who prioritise comfort, performance and the latest technology. At its core is a lightweight carbon frameset, designed with Proportional Response construction to ensure that every frame size offers consistent handling and compliance. Whether you’re climbing hills or cruising on back roads, the Synapse delivers a confident, smooth ride.

Cannondale Synapse Review

Key Features:

•     Carbon frame with Proportional Response and integrated StashPort storage
•     Full carbon fork with Delta steerer and hidden cable routing
•     Shimano 105 Di2 12-speed wireless electronic drivetrain
•     Shimano 105 7170 hydraulic disc brakes with 160mm rotors
•     DT Swiss R470 wheels with Vittoria Rubino Pro IV 32c tyres
•     C1 Aero Carbon seatpost and SmartSense compatibility
•     Available with 0% APR finance

Integrated neatly into the frame is Cannondale’s StashPort storage system, giving you space to stash tools or essentials securely in the downtube without adding clutter. The clean design continues up front with a carbon fork and Delta steerer, where internal cable routing keeps everything sleek and aerodynamic.

Shifting is handled by the brilliant Shimano 105 Di2 electronic groupset, now in its 12-speed version. Wireless operation means fewer cables and a more responsive, clean setup. With a 50/34 chainset and 11-34 cassette, the gear range is perfect for endurance riding and varied terrain, from rolling countryside to punchy climbs.

When it comes to control, Shimano 105 hydraulic disc brakes with 160mm rotors front and rear give you powerful, predictable braking whatever the weather.

The bike rolls on DT Swiss R470 wheels, offering a great balance of strength, weight and smoothness, while Vittoria Rubino Pro IV 32c tyres provide excellent grip, comfort and puncture resistance. They’re ideal for long rides, rougher tarmac or even light all-road use.

Rounding off the build is Cannondale’s C1 Aero 27 carbon seatpost, designed to offer flex and support while maintaining aero benefits. The Fizik Vento Argo X5 saddle is ergonomically shaped with a pressure-relieving cutout great for spending more hours in the saddle.

With SmartSense compatibility, hidden mudguard mounts and generous tyre clearance, the Synapse Carbon 4 is ready for everything from daily commutes to weekend epics.

Occasionally, without notice, manufacturers change product design and/or specifications.