Cannondale SystemSix Carbon Dura-Ace review

Cannondale debuts its carbon aero road machine

Our rating 
4.0 out of 5 star rating 4.0
GBP £4,999.00 RRP | USD $6,300.00

Our review

A rapid-handling race bike with cutting-edge aerodynamics
Buy if, You favour aero benefits over light weight but don’t want to compromise comfort or handling
Pros: Sublime Evo-like handling, spellbinding speed and smooth with it
Cons: Deep-section wheels can be a bit ponderous on climbs
Skip to view product specifications

The original SystemSix was one of Cannondale’s first forays into carbon-fibre road bikes. Now, Cannondale has entered the highly competitive aero-road bike genre with the revival of its historic race bike name.

Advertisement MPU reviews

The main goal was to create a bike that was more aerodynamic, more of the time. Cannondale discovered that for, say, a 75kg rider putting out 300 watts, the SystemSix will save a claimed 30 watts of effort over the company’s Evo.

In a 200m sprint at 60kph the SuperSix would be 0.4 seconds faster — in distance terms, four bike lengths. We’ve seen plenty of races won or lost by much less.

The carbon Cannondale range splits into two. Those like the one tested use a mix of high-grade fibres while a smaller, premium range of Hi-Mod bikes employ more high-modulus fibres to add stiffness and reduce weight. They’re aimed at elite riders or those with deep pockets.

The SystemSix is brutally fast when you need it but always nimble and sharp handling
Robert Smith / Immediate Media

My carbon model comes with the always-brilliant Shimano 9170 Dura-Ace groupset with a speed-orientated 52/36, 11-28 gearing combination. It’s one of the best mechanical groupsets ever made: slick, accurate and reliable with excellent brakes to match.

My bike receives a bar and stem from Vision. The Metron 4D Flat MAS bar would set you back close to £500 if bought separately, with a £100 Trimax OS stem, so it’s a pricey cockpit. The bar’s a great shape, its angled-forward flat-top sections offering a broad hold and enough width to rest your forearms on if you want to ease into an aero tuck.

The anatomic drop is the same as Vision’s other bars and one that I love. Its semi-compact shape offers a great in-the-drops feel and the flattened profile of the drop makes for a great hold.

Cannondale’s new wheels, the KNOT64s, are deep for a road wheel at 64mm, but weigh an impressive-for-the-size 1,600g a pair. The super-wide rim, in excess of 30mm externally and 21mm wide internally, wears a 23mm tyre.

You’d expect chatter with this much aero shaping, but it kills road noise
Philip Sowels/Immediate

When mounted to the KNOT64 rims they come up to 25.8mm and the bike can handle up to a 30mm tyre. The wheels are clamped in place via a new type of thru-axle that, rather than having to be removed completely, is retained in the wheel itself.

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

Within a few miles the overriding feeling on the SystemSix is familiar, like riding the Evo, one of the best-handling race bikes ever. As soon as I got chance to throw the SystemSix around it felt just as exciting as the Evo. There’s a bit of resistance from the deep wheels under acceleration but, once you’re up to speed, they hold on to it.

I expected a bit of chatter and vibration through a frame with this much aero shaping, and 23mm tyres, but the combination of the clever frame construction and Vittoria Rubino tyres does an admirable job of killing road noise.

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.

When a design can pull off all of these traits you’re getting close to the perfect all-rounder. It may be carrying a bit of extra weight over some of its rivals but it’s worth remembering that in this guise, although expensive, it’s half the cost of some of those rivals.

Cannondale SystemSix Carbon Dura-Ace specifications

Cannondale SystemSix Carbon Dura-Ace
Media Courtesy
  • Sizes: 51cm, 54, 56, 58*, 60 (*Tested)
  • Weight: 8.23kg
  • Frame: BallisTec Carbon
  • Fork: BallisTec Carbon
  • Chainset: Cannondale Si, 52/36
  • Bottom bracket: Cannondale press-fit
  • Cassette: Shimano Dura-Ace 11-28
  • Chain: Shimano Ultegra
  • Mechs: Shimano Dura-Ace
  • Shifters: Shimano Dura-Ace
  • Wheelset: Hollowgram KNOT64
  • Tyres: Vittoria Rubino Pro G+, 23mm
  • Wheel weight: 1.21kg (f), 1.56kg (r)
  • Stem: Vision Trimax OS
  • Bar: Vision Metron 4D MAS flat carbon bar
  • Headset: Tapered
  • Saddle: Prologo Dimension Tirox
  • Seatpost: KNOT Carbon
  • Brakes: Shimano Dura-Ace hydro disc, 160/ 140mm IceTech rotors
Advertisement MPU reviews

Cannondale SystemSix Carbon Dura-Ace geometry

  • Seat angle: 73.5 degrees
  • Head angle: 73 degrees
  • Fork offset: 4.5cm
  • Trail: 5.7cm
  • Bottom bracket drop: 6.9cm
  • Chainstay: 40.5cm
  • Seat tube: 54cm
  • Top tube: 60cm
  • Head tube: 17.2cm
  • Stack: 58cm
  • Reach: 39.8cm
  • Wheelbase: 100cm

Product Specifications


Name Name, 0, 10, Name, SystemSix Carbon Dura-Ace
Brand Brand, 0, 20, Brand, Cannondale

Available Sizes Available Sizes, 2, 0, Available Sizes, 51cm 54cm 56cm 58cm 60cm
Bottom Bracket Bottom Bracket, 2, 0, Bottom Bracket, Cannondale press-fit
Brakes Brakes, 2, 0, Brakes, Shimano Dura-Ace hydro disc, 160/ 140mm IceTech rotors
Cassette Cassette, 2, 0, Cassette, Shimano Dura-Ace 11-28
Chain Chain, 2, 0, Chain, Shimano Ultegra
Cranks Cranks, 2, 0, Cranks, Cannondale Si, 52/36
Fork Fork, 2, 0, Fork, BallisTec Carbon
Fork Offset Fork Offset, 2, 0, Fork Offset, 4.5
Frame Material Frame Material, 2, 0, Frame Material, BallisTec Carbon
Front Tyre Front Tyre, 2, 0, Front Tyre, Vittoria Rubino Pro G+, 23mm
Front Wheel Weight Front Wheel Weight, 2, 0, Front Wheel Weight, 1210
Handlebar Handlebar, 2, 0, Handlebar, Vision Metron 4D MAS flat carbon bar
Head Angle Head Angle, 2, 0, Head Angle, 73
Headset Type Headset Type, 2, 0, Headset Type, Tapered
Rear Derailleur Rear Derailleur, 2, 0, Rear Derailleur, Shimano Dura-Ace
Rear Tyre Rear Tyre, 2, 0, Rear Tyre, Vittoria Rubino Pro G+, 23mm
Rear Wheel Weight Rear Wheel Weight, 2, 0, Rear Wheel Weight, 1560
Saddle Saddle, 2, 0, Saddle, Prologo Dimension Tirox
Seat Angle Seat Angle, 2, 0, Seat Angle, 73.5
Seatpost Seatpost, 2, 0, Seatpost, KNOT Carbon
Shifters Shifters, 2, 0, Shifters, Shimano Dura-Ace
Stem Stem, 2, 0, Stem, Vision Trimax OS
Trail Trail, 2, 0, Trail, 5.7
Weight (kg) Weight (kg), 2, 0, Weight (kg), 8.23
Wheelset Wheelset, 2, 0, Wheelset, Hollowgram KNOT64
Chainstays (cm) Chainstays (cm), 2, 0, Chainstays (cm), 40.5
Seat Tube (cm) Seat Tube (cm), 2, 0, Seat Tube (cm), 54
Top Tube (cm) Top Tube (cm), 2, 0, Top Tube (cm), 60
Wheelbase (cm) Wheelbase (cm), 2, 0, Wheelbase (cm), 100
Frame size tested Frame size tested, 2, 0, Frame size tested, 58cm
Head Tube (cm) Head Tube (cm), 2, 0, Head Tube (cm), 17.2
Stack (cm) Stack (cm), 2, 0, Stack (cm), 58
Reach (cm) Reach (cm), 2, 0, Reach (cm), 58
All measurements for frame size tested All measurements for frame size tested, 2, 0, All measurements for frame size tested, 58cm
Bottom-bracket drop (cm) Bottom-bracket drop (cm), 2, 0, Bottom-bracket drop (cm), 6.9