Cannondale Synapse Carbon 4 bicycle – Chalk

Endurance road bike with Shimano 105 Di2 electronic drivetrain and carbon frame

Discover the Cannondale Synapse Carbon 4, the endurance road bike designed to offer the perfect balance of comfort, speed, and versatility. Built for longer road rides, yet agile for daily pedaling, this bike features a Shimano 105 Di2 12-speed electronic drivetrain, DT Swiss R470 rims, and wide Vittoria Rubino Pro IV 32c tires, for a smooth, stable, and high-performance riding experience.

Ideal for:

• High-performance road outings

• Long endurance rides

• Training groups and fast bike touring

Strengths of the Synapse Carbon 4:

• Lightweight and responsive carbon frame with endurance geometry and Proportional Response technology

• Shimano 105 Di2 wireless transmission: precise and effortless 2x12 electronic shifting

• Cannondale C1 Aero carbon seatpost for maximum efficiency and comfort

• Integrated StashPort system in the down tube with included StashBag

• Wide tire clearance and fender compatibility: ready for any condition

• Fizik Vento Argo R5 saddle for ergonomic comfort even on long rides

Performance for the real world

With a refined design, wind tunnel optimized, and a carbon construction that ensures an excellent stiffness-to-weight ratio, the Synapse Carbon 4 has been tested in the most extreme conditions. It’s no coincidence it was Lachlan Morton's choice to break the Australian record.

Superior comfort and perfect adaptability

The carbon lay-up has been improved to offer an 18% increase in flexibility compared to the previous model, absorbing vibrations from rough roads. Thanks to Proportional Response technology, each frame size is optimized to deliver consistent, tailored performance for every rider.

Ready for anything, wherever you go

The StashPort door with integrated StashBag lets you carry essentials securely and discreetly. The wide tire clearance and fender compatibility give you the freedom to explore longer, without compromise.

Technical Specifications

Details

• Platform: Synapse Carbon

• Model name: Synapse Carbon 4 SMU

• Model code: C12265U

Frame Kit

• Frame: Synapse Carbon, Proportional Response, integrated cable routing, StashPort, 12x142mm, UDH, BSA threaded BB 68mm, flat mount brakes, SmartSense Gen 2.0 and fender compatible

• Fork: Synapse Carbon, 12x100mm thru-axle, internal cable routing, 55mm offset, fender compatible

• Headset: Integrated 1-1/8" - 1-1/2"

Drivetrain

• Rear derailleur: Shimano 105 Di2 7150

• Front derailleur: Shimano 105 Di2 7150, braze-on

• Shift levers: Shimano 105 Di2 R7170, wireless, 12v

• Crankset: Shimano 105 7100, 50/34, BSA

• Cassette: Shimano 105 7100, 11-34, 12v

• Chain: Shimano 105 7100

• Bottom bracket: Shimano BSA 68

Brakes

• Brakes: Shimano 105 7170 hydraulic disc, RT70 rotors 160/160mm

• Brake levers: Shimano 105 Di2 7170

Wheels

• Rims: DT Swiss R470 DB, 28 holes

• Hubs:

  • Front: Shimano RS470, 12x100mm, centerlock

  • Rear: Shimano RS470, 12x142mm, centerlock

• Spokes: Stainless steel 14g

• Tires: Vittoria Rubino Pro IV, 700x32c

• Wheel size: 700c

Components

• Handlebar: Vision Trimax Aero Alloy

• Handlebar stem: Cannondale C1 Conceal, 31.8mm, -6°

• Handlebar tape: Cannondale Bar Tape 3.5mm

• Saddle: Fizik Vento Argo X5, 140mm

• Seatpost: Cannondale C1 Aero 27 Carbon, SmartSense compatible

  • Offset 0mm (sizes 44–48)

  • Offset 15mm (sizes 51–61)

Connectivity

• Wheel sensor: Cannondale Wheel Sensor

Included Accessories

• Large StashBag bag integrated into the down tube for storage

Note Well

Technical specifications may change without notice depending on component availability.
Product images are for illustrative purposes only and may not exactly reflect the described features.

The Cannondale Synapse Carbon 4 is the ideal bike for cyclists looking for a high-performance endurance road bike, equipped with advanced electronic technology, perfect for long rides, weekly outings, and comfort on any terrain.

Do you want to receive your bike ready for use? Don't forget to add the bike assembly service at the time of purchase! Discover all the details here: Francesconi bike assembly

A Complete Guide to Bike Sizes

Foreword: Not all bike sizes are the same

Each type of bike has a specific frame and often uses a different size scale. For example, a road bike with a 54cm frame might be considered a medium size by one brand, but a large by another.

Bicycle adjustment margins

Some types of bikes, like gravel bikes, offer a wide range of adjustments, adapting to different body types. Other models, however, have limitations in this regard. This is an important aspect to consider.

How to use size charts

We've created a simple guide to help you find the right bike size:

1. Check out our size charts for each bike type.
2. Learn more with specific tips to help you make the right choice.

Size Charts: Find Your Perfect Bike

Gravel and road bikes

Sizes are based on the length of the top tube (in cm), which determines the reach of the bike.

For gravel, measurements may vary slightly due to different geometries, but remain similar.

Mountain bike

MTBs are measured in inches, based on the seat tube.

Sizes also vary depending on the type of MTB: full-suspension , hardtail or fat bike .

Children's bikes

The size depends on the size of the wheels, often associated with age:

What to do with half measures?

If you are between two sizes:

• Comfort : Choose the larger size.
• Performance : Go for the smaller size.

Final tips for choosing

1. Consult the manufacturer's instructions : Always check the brand's guidelines.
2. Ask an expert : a specialized workshop can help you choose based on your height, ideal reach and goals.
3. Test the bike : If possible, test the model you intend to purchase.