Cannondale SystemSix

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Release Year
Wheel Size
Number of Gears
Gearing Type
16.88, 18.08, 18.7 lb
Brake Type
Frame Material

Summary of Reviews

We have read all expert and user reviews on the Cannondale SystemSix. In summary, this is what cyclists think.

19 reasons to buy

  • The Cannondale SystemSix is a fast bike. Many testers found their average speed was faster than on other aero road bikes.
  • Experts agree that the internal cable routing is neat and tidy on the bike.
  • The Prologo Dimension saddle is comfortable on the SystemSix.
  • The handlebars and stem offer up to 8° of adjustment, allowing riders the ability to position the bars for maximum comfort.
  • The asymmetric fork is aerodynamic. It balances airflow between the side of the bike with the disc brake and the non-disc side.
  • The SystemSix's seat stays are low slung and positioned behind the seat post, for greater aerodynamics.
  • The bike's wheels and tires are setup tubeless-ready.
  • The stiff carbon frame creates efficient power transfer when riding the SystemSix.
  • There are two positions for a water bottle on the bike. One position is more aerodynamic and the other allows easier access.
  • The SystemSix descends with confidence and stability, according to test riders.
  • It's easy to adjust the height of the System Six's bars, due to the split-hinge design of the bike's stem spacers.
  • The bike has a built-in power meter that is compatible with most bike computers and smartphones.
  • The bike's seat post has an aerodynamic profile.
  • There is ample space for a Di2 junction box in the downtube of the SystemSix.
  • Testers found the bike swept through corners smoothly.
  • The System Six is fit with KNØT 64 wheels, which are fast-rolling and maintain speed coming out of drafts.
  • The 73° head tube angle, on sizes 54-58cm, allows riders to maneuver the bike with control at top speeds.
  • The 72.7°- 75.1° seat tube angle places riders in an agile, aerodynamic riding position, on the SystemSix.
  • Experts found the SystemSix from Cannondale managed crosswinds well. They felt stable and in control, even in these conditions.

8 reasons not to buy

  • Cannondale’s SystemSix is heavy, compared to other aerodynamic road bikes.
  • The bike is not the most efficient climber.
  • The handlebars on the SystemSix are not ergonomic.
  • Testers note that the wheels and tires look strange, as the tire width is narrow compared to the rim width on the wheels.
  • The narrow wheels do not offer any compliance over bumps in the road.
  • The SystemSix is expensive.
  • Experts found it difficult to reach the seat post clamp to adjust the seat post, without scratching the bike.
  • Additional fees are required to activate the power meter on the bike.

Bottom line

The Cannondale SystemSix is claimed to be the fastest aero road bike available. Most testers agree that the bike did allow them to improve their average speeds on rides. The bike’s geometry allows riders to descend stably at top speeds. The SystemSix is aerodynamic in many ways. The tires are also narrower than the rims of the bike, for greater aerodynamics. The bike has a built-in power meter, but additional fees are required to activate it. This displeased testers who already found the bike to be expensive.

Expert Reviews

88/100 based on 6 rated expert reviews
Cycling Weekly

Cannondale SystemSix Carbon Ultegra Di2

If you were to imagine an aero bike, there’s every chance it would look just like the Cannondale SystemSix – completely angular and very aggressive.

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Cannondale SystemSix Hi-Mod Dura Ace Di2 Review

As a road bike, the SystemSix is a true marvel.

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Cannondale SystemSix Review

The SystemSix conveyed an unexpectedly nimble persona.

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Cannondale SystemSix Carbon Ultegra Review

Cannondale claims that its latest SystemSix is the “fastest bike in the world”, and top line wind-tunnel testing figures certainly add some weight to that with the Cannondale SystemSix generating drag of 203 watts.

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Cannondale SystemSix Carbon Dura-Ace Review

The SystemSix is what an aero bike should be: brutally fast when you need it but always nimble and sharp handling, tempered with a quality of ride that won’t beat you up and sap your energy.

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Cannondale SystemSix – Long Term Review

This bike has climbed brilliantly. It’s really fast.

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Big Rock Media

Cannondale SystemSix | Honest Owner Review

The Cannondale SystemSix is Cannondale’s latest and greatest aerodynamic road bike.

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Cannondale SystemSix Review. Aero Road Bike Tested!

Cannondale claims this bike as the fastest aero bike ever made.

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Patts Bikes

Cannondale SystemSix Review

Everything is very very aerodynamic.

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Hank Epton

Cannondale SystemSix Ultegra Di2 Walkaround

It is as advertised. It is lightning quick.

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Cam Nicholls

Why I Love-Hate the Cannondale SystemSix

If you’re one of those fortunate people that can afford to have two bikes and you want a super fast bike, then you’d have this for your fast days.

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Emily Fowler

The Cannondale SystemSix Hype is Real! (New Bike Day)

It is really fast.

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5 Problems Of The New Cannondale SystemSix, That No One Talks About…

It’s not a beautiful bike and aero bikes should be the most beautiful road bikes

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Gran Fondo

Cannondale SystemSix Hi-MOD DURA-ACE Di2 Review

The Cannondale SystemSix Hi-Mod was designed with a single goal in mind: to be the fastest and most efficient UCI-compliant race bike.

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Blaze the Pavement on Cannondale’s SystemSix Hi-Mod Dura-Ace Women’s Road Bike

A sleek, sexy aero beast that tells the world you’re not effing around, because it does not eff around.

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User Ratings

87/100 based on 6 ratings
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Bike Comparison

Cannondale SystemSix in comparison to averages