Cannondale Synapse Carbon 4 2025 - Road Reimagined
The Cannondale Synapse Carbon 4 blends high-performance technology with real-world versatility. Designed for riders who want speed without sacrificing comfort, it features the smooth, precise shifting of Shimano 105 Di2.
It's lightweight carbon frame is engineered for a ride that’s fast, composed and comfortable. With a 20% boost in compliance over the previous model, the Synapse delivers a smooth ride, even on the longest and roughest rides. It’s ready for wide tires, fenders, and whatever the road throws your way.
Thanks to Cannondale’s Proportional Response Construction, each frame size is uniquely tuned for ideal handling and ride quality - so every rider, regardless of height, gets a bike that fits and performs flawlessly.
Highlights
Lightweight, Compliant & Aero Carbon Frameset: The Synapse carbon frame strikes the perfect balance of low weight, road-smoothing compliance, and aerodynamic efficiency - now with hidden StashPort downtube storage for on-the-go essentials.Shimano 105 Di2 Drivetrain: Experience fast, precise, and ultra-reliable shifting with Shimano’s 2x12-speed 105 Di2
DT Swiss R470 Rims & Vittoria Rubino Pro IV 32c Tires: A durable and responsive wheel-tire combo offering excellent grip, long-lasting performance and all-day speed on a variety of road surfaces.
Cannondale C1 Aero 27 Carbon Seatpost: Designed for both comfort and performance, this seatpost ensures a smooth ride.
Geometry

44.0 | 48.0 | 51.0 | 54.0 | 56.0 | 58.0 | 61.0 | |
---|---|---|---|---|---|---|---|
Wheel Size | 700c | 700c | 700c | 700c | 700c | 700c | 700c |
A Top Tube Length (cm) | 40.7 | 44.3 | 44.3 | 48.0 | 52.0 | 55.0 | 59.0 |
B Top Tube Horizontal (cm) | 52.2 | 53.3 | 54.4 | 55.5 | 56.7 | 58.0 | 59.8 |
C Top Tube Actual (cm) | 47.8 | 48.6 | 49.7 | 50.9 | 52.3 | 53.7 | 55.6 |
D Head Tube Angle | 69.8° | 70.9° | 71.3° | 71.3° | 71.3° | 71.3° | 71.3° |
E Seat Tube Angle | 73.0° | 73.0° | 73.0° | 73.0° | 73.0° | 73.0° | 73.0° |
F Standover (cm) | 71.4 | 72.2 | 75.2 | 78.5 | 81.5 | 84.3 | 87.8 |
G Head Tube Length (cm) | 9.1 | 10.8 | 12.7 | 15.0 | 17.1 | 19.6 | 22.7 |
H Wheelbase (cm) | 100.3 | 100.5 | 101.3 | 102.6 | 104.4 | 105.8 | 107.7 |
I Front Center (cm) | 58.9 | 59.2 | 60.0 | 61.2 | 62.4 | 63.8 | 65.7 |
J Chain Stay Length (cm) | 42.5 | 42.5 | 42.5 | 42.5 | 43.0 | 43.0 | 43.0 |
K Bottom Bracket Drop (cm) | 7.5 | 7.5 | 7.5 | 7.3 | 7.3 | 7.0 | 7.0 |
L Bottom Bracket Height (cm) | 27.8 | 27.8 | 27.8 | 28.0 | 28.0 | 28.3 | 28.3 |
M Fork Rake (cm) | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
N Trail (cm) | 7.1 | 6.4 | 6.1 | 6.1 | 6.1 | 6.1 | 6.1 |
O Stack (cm) | 51.0 | 53.0 | 55.0 | 57.0 | 59.0 | 61.0 | 64.0 |
P Reach (cm) | 36.6 | 37.1 | 37.6 | 38.1 | 38.7 | 39.3 | 40.2 |
Q Axle to Crown (cm) | 39.3 | 39.3 | 39.3 | 39.3 | 39.3 | 39.3 | 39.3 |
FAQs: Cannondale Synapse Carbon 4 2025
Basics
What size bike do I need?
What is Invisiframe and is it worth fitting it to the Synapse?
What is tubeless setup and can the Synapse be set up tubeless?
What equipment & info will the bike arrive with?
Is it possible to see the Synapse in your showroom & is it possible to have a test ride or demo it?
What type of bike is the Synapse?
How should you clean & maintain the Cannondale Synapse Carbon 4 2025?
I'm new to riding, what essential bits of kit do I need to get going?
Where can I ride the Cannondale Synapse Carbon 4 2025?
Technical
Where can I find all of the major components that come on the bike?
Can you fit a water bottle on the bike?
What warranty comes on the Cannondale Synapse Carbon 4 2025?
Does the Cannondale Synapse Carbon 4 2025 come with pedals?
Can I get hold of spare / replacement parts easily for the Cannondale Synapse Carbon 4 2025?
Can I add upgrades to the bike?
Purchasing
Why choose MTB Monster?
Do you offer 0% finance for the Cannondale Synapse Carbon 4 2025?
Do you accept Cycle To Work vouchers? How does it work?
I'm still sorting my payment method, can I reserve a bike?
The bike is not yet in stock, can I pre-order one?
How will the bike be delivered & what are the setup requirements?
What are the delivery options?
Can I collect the bike in the store?
I still have more questions, can I speak to someone?
- 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
- FRAME MATERIAL:
- Carbon
- FORK BRAND:
- Cannondale (Rigid)
- 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
- FORK TRAVEL:
- Rigid Fork
- WHEEL SIZE:
- 700 c
- WHEELS:
- Rims: DT Swiss R470 db, 28h / Hubs: (F) Shimano RS470, 12x100mm centerlock / (R) Shimano RS470, 12x142mm centerlock / Spokes: Stainless Steel, 14g
- TYRES:
- Vittoria Rubino Pro IV, 700x32c
- DROPPER SEATPOST:
- No
- SEATPOST:
- Cannondale C1 Aero 27 Carbon, SmartSense compatible, 0mm offset (44-48cm), 20mm offset (51-61cm)
- SADDLE:
- Fizik Vento Argo X5, 140mm
- CRANKSET:
- Shimano 105 7100, BSA, 50/34
- STEM:
- Cannondale C1 Conceal, Alloy, 31.8, -6°
- TAPE:
- Cannondale Bar Tape, 3.5mm
- SHIFTERS:
- Shimano 105 Di2 R7170, wireless, 12-speed
- BRAKE BRAND:
- Shimano
- HYDRAULIC BRAKES:
- Yes
- BRAKES:
- Shimano 105 7170 hydraulic disc, 160/160mm RT70 rotors
- FRONT DERAILLEUR:
- Shimano 105 Di2 7150, braze-on
- REAR DERAILLEUR:
- Shimano 105 Di2 7150
- CHAIN:
- Shimano 105 7100, 12-speed
- NUMBER OF GEARS:
- 12 speed
- PEDALS:
- Available for Purchase
- FRONT MUDGUARD:
- MTB Monster
- EXTRAS:
- Large StashBag downtube storage bag
- PLEASE NOTE:
- Cannondale reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, and materials.