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.
BMC Roadmachine ONE Ultegra Di2 Road Bike
The BMC Roadmachine ONE Ultegra Di2 Road Bike is an ideal long-distance explorer that can also mix it with the fast group on the Sunday club run.
The frame uses BMC’s Tuned Compliance Concept Endurance carbon layup to carefully marry together the requirements of comfort and performance, ensuring that the frame is compliant enough for rough tarmac and sufficiently stiff to transfer all power efficiently to the rear wheel. At the front end, the Integrated Cockpit System (ICS) has a neat reverse front plate stem and ergonomic handlebar whilst at the back, the D-shaped carbon seatpost adds further compliance to the ride. Cables are routed internally once they reach the frame to keep them out of harm’s way and to help reduce drag.
With an 11-34t cassette, 50/34t chainset and instant electronic shifting, the Shimano Ultegra drivetrain is a joy to use whether in the mountains or on the flat. The system can be connected to a GPS device or smartphone using Bluetooth, giving some options for customisation and access to riding data such as battery state and shift numbers. Servo Wave technology from Shimano’s MTB range means more power and easier modulation for the disc brakes, and greater clearance between rotor and pad for less inadvertent drag.
BMC’s own 33mm deep CRD-321 carbon wheels finish off the spec list, offering tubeless compatibility and a depth that won’t be troubled by crosswinds but that can still confer some aerodynamic advantage at speed.
Highlights
- Roadmachine Premium Carbon frame and fork with Tuned Compliance Concept Endurance
- Shimano Ultegra 8170 hydraulic disc brakes
- Shimano Ultegra Di2 8150 electronic 12-speed drivetrain
- 35mm deep BMC CRD-321 Carbon wheelset
- 33mm tyre clearance
Technical Specification
| Frame | BMC Roadmachine Premium Carbon with Tuned Compliance Concept Endurance, internal cable routing, flat mount disc, 12x142mm thru-axle |
| Fork | BMC Roadmachine Premium Carbon with Tuned Compliance Concept Endurance, internal cable routing, flat mount disc, 12x100mm thru-axle, 50mm offset (Size 47-51), 45mm offset (Size 54-61) |
| Bottom Bracket | PF86 |
| Stem | BMC ICS1 - Integrated Cockpit Design |
| Handlebar | BMC RAB 02, ergo top shape, compact bend |
| Bar Tape | BMC |
| Front Brake | Shimano Ultegra 8170 hydraulic disc brake caliper with Shimano RT-MT800 160mm rotor |
| Rear Brake | Shimano Ultegra 8170 hydraulic disc brake caliper with Shimano RT-MT800 140mm rotor |
| Brake Levers | Shimano Ultegra 8170 hydraulic |
| Front Derailleur | Shimano Ultegra Di2 8150, 12-speed |
| Rear Derailleur | Shimano Ultegra Di2 8150, 12-speed |
| Shift Levers | Shimano Ultegra Di2 8150, 12-speed |
| Chain | Shimano Ultegra, 12-speed |
| Cassette | Shimano Ultegra CS-R8100, 11-34, 12-speed |
| Crankset | Shimano Ultegra 8100 50/34 |
| Front Wheel | BMC CRD-321 Carbon, 700c, 35mm depth, tubeless-ready |
| Rear Wheel | BMC CRD-321 Carbon, 700c, 35mm depth, tubeless-ready |
| Front Tyre | Vittoria Rubino, 28mm 700c, clincher |
| Rear Tyre | Vittoria Rubino, 28mm 700c, clincher |
| Saddle | Fizik Taiga |
| Seatpost | BMC Roadmachine Premium Carbon D-Shaped Seatpost 15mm offset |
| Pedals | Available to be purchased separately |
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.
BMC Roadmachine ONE Ultegra Di2 Road Bike Sizing
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