Factor O2 Ultegra Di2

Our lightest and most versatile frame and fork set, equipped with Ultegra, delivers an inspiringly refined ride!


The O2 is our beautiful chameleon. It’s our most versatile bike and combines minimalist beauty with exceptional performance, riding lightly at a scant 740g for the frameset; it’s equally at home effortlessly consuming the mountains of France as it is rolling sublimely over Belgian pavé.

Built with full Shimano Ultegra Di2 with Black Inc Thirty carbon clincher wheels, FSA cockpit, lightweight and aero Svelte fork with size-specific tapered steerer, and rolling on CeramicSpeed bearings throughout, the O2 Ultegra delivers a ride of pure luxury performance that’s inspiring, refined and intoxicating.

As with all our bikes, the O2 is a peerless combination of master craftsmanship, the very finest materials, innovative engineering and manufacturing processes all brought together with the highest possible level of finishing and attention to detail in our wholly-owned factory; with more than 20 years of cutting edge expertise, the O2 is the pinnacle in carbon frame building mastery.

We don’t compromise – anywhere – and the results of this single minded approach are clear as soon as you swing a leg over the O2. Even when climbing – except for the most extreme of gradients – aerodynamics remain critical to performance. That’s why we’ve worked tirelessly to ensure the O2 is both as light and as aero as possible: our Svelte fork has one of the smallest surface areas of any fork; the frame tube profiling has been rigorously engineered to minimise drag and save still further precious watts.

Of course, the O2’s exceptional lightweight construction doesn’t come at the sacrifice of stiffness or comfort: asymmetrical chainstays balance out chain pull and deliver magnificent power transmission while our micro seatstays provide all day comfort. In addition, each of the individual fibres have been obsessively selected and expertly combined to ensure our pursuit of ride perfection is achieved: the O2 responds both immediately and intuitively to your every input with a lively, interactive ride that also gently filters out fatiguing road buzz and vibrations to provide total comfort and confidence. When you kick for the summit, the O2 soars; when you carve into the turn, the O2 inspires; and when you hit the cobbles, the O2 excels.

The Details

Our attention to detail on the O2 is absolute, from precisely controlling the material and resin production process, right down to everyday practical detailing that ensures that assembly and maintenance are as refined as the ride itself:

  • UCI legal
  • Our frame laminate design and manufacturing process ensures that we put the waste into the garbage can and not into the frame; using a computer programme called Fibersim, each layer is specifically cut to minimise any overlaps or extra materials where they are not required. The result: the strongest, lightest frame possible.
  • The O2 frame is made with three different carbon types, each selected for different performance characteristics. Standard Modulus, Medium Modulus and High Modulus Pitch Fibre. While the first two are common to the cycling industry the last – the Pitch Fibre – is far more rare because it demands specific skills to work with, and comes at a relatively very high cost. But we use it simply because it’s the lightest and stiffest carbon available for bike frames that can be manipulated.
  • The O2’s Svelte fork uses a 1-1/8" to 1-3/8" tapered steerer, an organically blended fork crown/headtube junction, and sculpted lowers that all combine to minimise the surface area of the fork, yield ultra low weight and be laterally stiff: the Svelte delivers a compliant ride that, together with wider, higher volume tyres (the Svelte is designed to clear 28c+ tyres) will smooth even the harshest pavé.
  • The O2 Ultegra comes with a traditional stem and handlebar option to maximise bike fit.
  • The O2 has ample tyre clearance to allow the comfort and performance benefits that come from using wider, higher profile tyres – up to 28c.
  • The hidden seatpost clamp contributes to the O2’s clean and uncluttered aesthetic and improves aerodynamic.
  • The BBright bottom bracket system is extremely light, exceptionally stiff and is compatible with the majority of aftermarket cranksets, including: BBright, BB386 EVO, standard Shimano, SRAM and Campagnolo 24mm external-type cranks.
Frame RGi Carbon construction, tapered/shaped 1-1/8" upper and 1-3/8" lower head tube, compact pro race geometry, internal cable routing
Fork RGi Carbon, Svelte, 
Headset Cane Creek 40 series headset, Factor top cap
Stem FSA  
Handlebars FSA
Tape Factor Hi Grip fraction tape
Front Brake Shimano Ultegra 6800
Rear Brake Shimano Ultegra 6800
Front Derailleur Shimano Ultegra Di2 11-speed, braze-on
Rear Derailleur Shimano Ultegra Di2 11-speed
Shift Levers Shimano Ultegra Di2
Casette Shimano Ultegra 11-speed, 11-28t
Chain Shimano Ultegra 11-speed
Crankset Shimano Ultegra
Front Wheel Black Inc Thirty clinchers, Ceramic Speed Bearings, Black Inc Aero Hub, Sapim CX Ray spokes.
Rear Wheel Black Inc Thirty clinchers, Ceramic Speed Bearings, Black Inc Aero Hub, Sapim CX Ray spokes.

Download geometry here. Please note that the bike will be provided with size specific integrated Bar and Stem, this can be varied to suit your fit requirements by liaising with your dealer.

Size 49 52 54 56 58 61
Stack 495 520 542 565 588 611
Reach 367 376 384 392 401 409
Seat Tube Angle 73.0° 73.0° 73.0° 73.0° 73.0° 73.0°
Head Tube Angle 70.5° 72.5° 73.1° 73.5° 73.5° 73.5°
BB Drop 68 68 68 68 68 68
Chainstay Length 405 405 405 405 405 405
Integrated Stem 90 90 110 110 120 120
Integrated Bar (c-c) 400 400 420 420 440 440
Top Tube 515 535 549 565 581 596
Head Tube 95 115 131 154 178 202