This comparison focuses on ride feel and geometry between Cannondale’s SuperSix and Synapse lineups, using the SuperSix EVO 3 and Synapse Carbon 5 due to their similar pricing and component spec.
When we first look at these bikes side by side, they actually look pretty similar. Both bikes feature lightweight carbon frames and Shimano 105 12-speed drivetrains. On the road, however, they deliver two very different experiences. At Quick Cranks, we’re often asked which Cannondale road bike is best for riders who want speed without sacrificing comfort. The answer comes down to geometry, ride feel, and how you actually ride.
For consistency, this comparison references a size 56cm frame for both bikes.
A Quick Comparison: What’s the Difference?
- Cannondale SuperSix EVO 3: Lighter, faster, more aggressive, more responsive
- Cannondale Synapse Carbon 5: Smoother, more stable, and comfort-focused
Side-by-Side Geometry Comparison Table (2025 Models)
| Category | SuperSix EVO 3 | Synapse Carbon 5 |
| Rider Position | Aggressive / Low | Relaxed / Upright |
| Stack (mm) | 575 | 590 |
| Reach (mm) | 389 | 387 |
| Stack-to-Reach Ratio | 1.48 | 1.52 |
| Head Tube Angle | 73° | 71.3° |
| Trail (mm) | 58 | 61 |
| Wheelbase (mm) | 994 | 1044 |
| Front Center (mm) | 594 | 624 |
| Chainstay Length (mm) | 410 | 425 |
| Bottom Bracket Drop (mm) | 72 | 73 |
| Fork Rake (mm) | 45 | 55 |
| Tire Size (stock) | 25c | 32c |
| Max Tire Clearance | 700x30 | 700x42 |
| Seatpost Offset (size-dependent) | 0–20mm | 15mm |
| Frame Compliance Focus | Speed-biased | Comfort-biased |
| Best Use Case | Racing, fast group rides | Endurance rides, rough roads |
Geometry Deep Dive: Why These Bikes Feel So Different
Although the SuperSix EVO and Synapse share Cannondale DNA, their geometry creates two very distinct ride experiences. Looking at the numbers side by side helps explain why one feels razor-sharp while the other feels calm and composed.
SuperSix EVO 3: Low, Sharp, and Race-Focused
The SuperSix EVO 3 is built around an aggressive rider position and quick, reactive handling. With a 575mm stack and 389mm reach, the EVO keeps the front end noticeably lower while maintaining a similar cockpit length to the Synapse. This creates a longer, flatter torso angle that improves aerodynamics, shifts more weight onto the front wheel, and encourages aggressive riding; the foundation of the EVO’s race-focused feel.
A steeper 73.0° head tube angle paired with a shorter 5.8cm trail results in fast steering and immediate turn-in. The bike feels highly responsive when cornering or making rapid line changes, rewarding confident riders who like precise handling.
The EVO’s compact 99.4 cm wheelbase and short 410mm chainstays once again reinforce its snappy personality. Acceleration feels immediate, especially when sprinting or climbing out of the saddle, and the bike is easy to flick through tight corners (very twitchy feel).
With a slightly higher bottom bracket drop (~72mm), the SuperSix EVO feels lively and eager to change direction; ideal for racing, fast group rides, and hard efforts where responsiveness matters most.
Key Takeaways (SuperSix EVO 3)
- Excels during punchy climbs and attacks
- Feels quick and precise on descents
- Thrives in fast group rides and competitive settings
- Prioritizes speed and engagement over long-ride comfort
Synapse Carbon 5: Taller, Longer, and Endurance-Oriented
The Synapse Carbon 5 is designed for comfort, stability, and consistency over long distances. Its 590mm stack and 387mm reach place the rider in a more upright position. That extra 15mm of stack significantly reduces strain on the lower back, neck, and shoulders, especially on long rides or rough pavement.
A slacker 71.3° head tube angle and longer ~6.1cm trail slow steering just enough to feel predictable and composed. The front end tracks smoothly on descents and remains calm on imperfect roads, reducing fatigue and rider input over time.
The Synapse’s 104.4cm wheelbase (roughly 50mm longer than the EVO) stretches the bike out, increasing straight-line stability and smoothing weight transfer. Longer 425–430mm chainstays improve rear-wheel traction and composure, especially when climbing seated or riding uneven surfaces.
Combined with a slightly lower bottom bracket (~73mm), wider 32c tires, and endurance-focused carbon layup, the Synapse delivers a planted, confidence-inspiring ride that feels easier on the body over hours in the saddle.
Key Takeaways (Synapse Carbon 5)
- Climbs best at a steady, seated pace
- Feels calm and predictable on descents
- Excels on rough pavement and long rides
- Ideal for solo endurance rides, fondo’s, and all-day efforts
Which Cannondale Road Bike Should You Choose?
If you’re deciding between the Cannondale SuperSix and the Cannondale Synapse, your decision should be based around how you want the bike to feel while you ride.
Choose the Cannondale SuperSix if…
You want to ride fast and feel everything. The SuperSix line-up is for riders who like an engaged, energetic ride. If you enjoy pushing the pace, or riding in fast groups, this bike rewards effort. It feels quick, direct, and responsive the moment you get up off your seat.
Choose the Cannondale Synapse if…
You want to ride longer and feel fresher. The Synapse is for riders who value comfort without giving up performance. If your rides are longer, or maybe your roads aren’t always perfect, the Synapse makes more sense. It’s smooth, stable, and the kind of bike that disappears beneath you as the miles add up.
