Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
All our bikes are fully built by our Cytech qualified mechanics. To find out more, see the Built, Checked, Tuned and Tested section below to see how we'll deliver your bike.
We offer FREE DELIVERY of your bike to your home or place of work. Once you've placed your order, our Customer Care team will be in contact to offer a convenient delivery date of your choice.
We've partnered with Pedalsure to offer you 30-DAYS FREE bike insurance on new bikes over £400. Visit our Cycle Insurance page to learn more and claim.
Cannondale's highest grade of carbon makes the frameset ultralight, responsive and comfortable.
An electronic gear setup that gives precise and smooth shifts through its range.
An aero frameset works in unison with sculpted bars, stem and seatpost to reduce drag markedly.
Deep and wide carbon rims lower drag and rolling resistance to increase speed in all conditions.
Cannondale SystemSix HiMOD Ultegra Di2 Disc Road Bike 2021
The Cannondale SystemSix HiMOD Ultegra Di2 Disc Road Bike unites an aerodynamically advanced design with sophisticated composite materials to result in the fastest possible performance across an impressive sweep of road riding scenarios.
The frameset utilises high-modulus carbon and moulds this into wind tunnel refined tube sections via an intricate lay-up pattern. The outcome of this combination is the lowest possible drag as well as maximum pedalling efficiency and serene levels of comfort. The aerodynamic shapes of the seatpost, stem and handlebars work seamlessly with the frame's air slicing properties to help any rider go faster on the flat and on any climb with an average gradient of up to 6%. Generous frameset-to-tyre clearance offers the chance of using tyres of up to 30mm in width, allowing rougher roads to be tackled with increased comfort and control.
The HollowGram 64 KNOT wheelset has a deep and wide full carbon rim to lower drag significantly. At the same time, its broad, and blunt profile enhances stability in crosswinds by calming the turbulent air caused by high wind yaw angles. Lower rolling resistance is also promoted by this rim thanks to its wide inner width that coerces tyres into a superior cross-sectional profile.
Accurate and smooth, the Shimano Ultegra Di2 gear configuration helps the rider always to select the correct cadence, regardless of course topography. The Ultegra marque also takes care of stopping duties with this hydraulic disc brake set-up bestowing confidence under even the most inclement of weather conditions.
- An aerodynamically refined road bike that slices through the air to deliver the fastest possible ride experience across flat to heavily rolling parcours
- Full BallisTec Hi-MOD carbon frameset is light, stiff and compliant
- Drastically tuned frame tube profiles lower aerodynamic drag significantly to help any rider go faster on the flat and on any climb with an average gradient of up to 6%
- Aero seatpost, handlebar and stem complement the wind cutting frameset
- Hidden and clean cable routing inside the frame offers minimal drag but easy serviceability
- Clearance for up to 30mm tyres gives extra comfort and enhanced control across any road surface
- Race inspired geometry donates precise and composed handling
- HollowGram 64 KNOT wheelset has 64mm deep carbon rims that possess aerodynamically tuned profiles for lowered drag and increased crosswind stability
- Shimano Ultegra Di2 electronic 11-speed gears are accurate and reliable
- Shimano hydraulic disc brake set up bestows confidence inspiring stopping power and control
|Frame||Cannondale BallisTec Hi-MOD Carbon, integrated cable routing with Switchplate, SAVE, PF30a, flat mount disc, 12x142 Speed Release thru-axle|
|Fork||Cannondale BallisTec Hi-MOD Carbon, 1-1/8” - 1-1/4” steerer, 12x100mm Speed Release thru-axle, flat mount disc, 55mm offset (47-51cm frame sizes) 45mm offset (54-62cm frame sizes)|
|Headset||Cannondale Integrated, 1-1/8” - 1-1/4|
|Bottom Bracket||Cannondale Alloy PressFit30|
|Stem||HollowGram KNØT, Alloy with cable cover, -17 degree|
|Handlebar||HollowGram KNØT SystemBar, Carbon, 8-degree pitch adjust|
|Bar Tape||Cannondale Bar Tape, 3.5mm|
|Front Brake||Shimano Ultegra Di2 hydraulic disc brake, 160mm RT800 disc rotors|
|Rear Brake||Shimano Ultegra Di2 hydraulic disc brake, 140mm RT800 disc rotors|
|Brake Levers||Shimano Ultegra Di2, hydraulic disc brake|
|Front Derailleur||Shimano Ultegra Di2, braze-on|
|Rear Derailleur||Shimano Ultegra Di2, 11-speed|
|Shift Levers||Shimano Ultegra Di2, 11-speed|
|Chain||Shimano HG701, 11-speed|
|Cassette||Shimano Ultegra, 11-30, 11-speed|
|Crankset||HollowGram, BB30a, OPI SpideRing, 52/36 chainrings|
|Front Wheel||HollowGram 64 SL KNØT, Carbon, 20h, 64mm deep, 21mm internal width, tubeless-ready rim, HollowGram KNØT, sealed bearing 12x100mm Centre Lock hub, HollowGram 2.0/1.8/2.0 x 20 spokes|
|Rear Wheel||HollowGram 64 SL KNØT, Carbon, 24h, 64mm deep, 21mm internal width, tubeless-ready rim, HollowGram KNØT, 12x142mm Centre Lock with DT Swiss 350 internals hub, HollowGram 2.0/1.8/2.0 x 24 spokes|
|Front Tyre||Vittoria Rubino Pro Speed, 700 x 25c, clincher|
|Rear Tyre||Vittoria Rubino Pro Speed, 700 x 25c, clincher|
|Saddle||Prologo Dimension NDR, Tirox rails|
|Seatpost||HollowGram 60 KNØT Carbon, 330mm|
|Pedals||Available to be purchased separately|
|Accessories||Cannondale wheel sensor|
Built, Checked, Tuned and Tested
All our bikes are fully built, checked, tuned and tested by our Cytech qualified mechanics and then securely packaged, ready for delivery. All you have to do is add the pedals (if included), attach the handlebars to the stem and tighten them following the included detailed instructions or by watching our video and using the provided FREE tools. Visit our Bike Assembly page to see how you assemble your new bike once you receive it.
All bikes collected from our shop, are built, tested and ready to ride.
Please note, occasionally, manufacturers may change the specification without notice. Bicycles do not come with pedals unless otherwise specified. Bikes ordered for delivery will not arrive with the pedals installed, please refer to the owners manual and pedal installation guides provided for guidance. We do not install accessories to bikes, including mudguards. Bikes ordered for delivery that have tubeless compatible tyres and rims will arrive with inner tubes installed or with tubeless valves installed, this will be brand dependent. Sealant is available to be purchased separately.
If you require any assistance please contact our Customer Care team.