This article originally appeared on BikeRadar
Apart from shifting the brake calipers from rim edge to dropouts, there's little to distinguish the SuperSix Evo Disc frameset's profile from its SuperSix Evo cousin. But Cannondale didn't just tweak the existing frame, it went through a total redesign resulting in a 56cm frameset weight of 1,189g, just 92g more than the rim-braked model.
- Highs: Ride quality, great handling, all-round speed, wheelset
- Lows: Protruding wheel release levers, Ultegra Di2 adds weight
- Buy if: You want the performance of a SuperSix Evo that's not compromised by the addition of disc brakes
An equivalent rim-braked SuperSix Evo HM bike can weigh up to half a kilogram less than this bike's 7.61kg, but that's pretty light for discs, and feels even lighter from the saddle, as the additional weight from the brake calipers, rotors, Di2 derailleur motors and battery is all around hub height, and doesn't directly affect rotational mass.
Cannondale's Hollowgram Si wheelset does affect rotational mass, and the 25mm external, 19mm internal and 35mm tall carbon rims come with Stan's No Tubes rim tape. They're an ideal extension of the Evo Disc's historical attributes, and, even with inner tubes, the Schwalbe One tubeless tyres feel racy.
Cannondale used the most subtle truncated aero profiles for the major wind-facing tubes, to reduce drag without compromising stiffness and compliance. Some rear end compliance has been sacrificed in the redesign, relying more on the slim 25.4mm carbon seatpost and Delta-Tube seat-tube for vibration reduction.
It's hard to notice, especially when the 25mm tyres inflate to a plump 28mm. At 85psi, the Evo Disc rides corrugated tarmac with such composure that I had to remind myself it's a race bike, not an endurance model.
The relationship between wheels and frameset is more crucial due to the importance of disc brake alignment. The fork's continuous carbon fibre construction gives ultimate strength to weight, with a thru-axle managing the 160mm rotor's braking forces.
Cannondale decided on a quick-release rear wheel, citing hub weight savings and faster in-race wheel swaps as the reasons. Weight transfer under braking means less force can be applied through the rear brake, and performance was never less than excellent, with no evidence of rub in any situation.
Whether racing or not, there's no excuse not to feel racy aboard this bike, as its ability to cruise and cosset, or hammer and carve are equally accessible.
Shimano's Ultegra Di2 looks classy and swiftly snicks between gears, and the stiff Hollowgram Si crank with one-piece 52/36 SpideRing ups the quality quotient.
Cannondale's mid-range aluminium bar and stem are decent, and the slim carbon post topped by a Fizik Arione saddle is a tried and trusted combination. If weight is a consideration, Di2 comes with a penalty, and there are small savings to be made on finishing kit.
The wheels are stiff, agile and stable in winds, and you could make them tubeless, saving rotational weight while improving ride quality and rolling resistance.
Functionally, there's nothing I'd change about the bike, but aesthetically, the wheel release levers protrude 25mm from the frame.
The nod toward aero tube shaping is an example of not wishing to dilute the Evo's ethos as a true all-rounder that can climb, descend, conquer technical turns and float along with incredible speed.
Name: SuperSix Evo HM Disc
Built by: Cannondale
Price: £4,700.00 / US$6,200.00 / AU$ N/A
Available Sizes: 50cm 52cm 54cm 56cm 58cm
Bottom Bracket: Cannondale alloy PF30
Brakes: Shimano RS805 disc, 160mm/140mm rotors
Cassette: Shimano Ultegra 11-28
Chain: Shimano HG701
Cranks: Cannondale HollowGram Si crank, 52/36 SpideRing
Fork: SuperSix Evo Disc, BallisTec carbon
Fork Offset: 3.47
Frame Material: SuperSix Evo Disc, BallisTec HM carbon
Front Derailleur: Shimano Ultegra Di2
Front Tyre: Schwalbe One tubeless 700x25mm
Front Wheel Weight: 1220
Handlebar: Cannondale C2
Head Angle: 72.5
Headset Type: SuperSix Evo 1.25in lower bearing
Rear Derailleur: Shimano Ultegra Di2
Rear Tyre: Schwalbe One tubeless 700x25mm
Rear Wheel Weight: 1640
Saddle: Fizik Arione R5
Seat Angle: 73.5
Seatpost: Cannondale C2 UD carbon 25.4mm
Shifters: Shimano RS785 hydraulic, Di2
Stem: Cannondale C2
Weight (kg): 7.61
Wheelset: Cannondale HollowGram Si carbon clincher/ tubeless disc
Bottom Bracket Height (cm): 27
Chainstays (cm): 40.5
Seat Tube (cm): 54.5
Standover Height (cm): 81
Top Tube (cm): 57
Wheelbase (cm): 99
Frame size tested: 56cm