We have assembled a limited number of the pro cycling grade Factor O2 Disc framesets built into complete bikes spec'ed with a Shimano Ultegra Di2 R8070 groupset and a Shimano RS770 C30 Carbon Wheelset. The complete package is worthy of a cyclist who heads out on every ride with a purpose.

Serious cycling enthusiasts can appreciate excellence across the industry. Factor Bikes isn't a true boutique bike company, nor is it a mass producer of makes and models. With a direct and impressive background in aerodynamics and carbon fiber technology, engineering and manufacture, Factor has disrupted the high-end road carbon bike category. The O2 Disc Frameset is an incredible road race design that weighs in at 810 grams (54cm), yet rides with preternatural smoothness, power transfer, handling, and overall performance.

Each size of the O2 Disc has its own specific lay-up and definitive tube sizes. This is no cookie-cutter frameset. Factor has mastered the processes of Computer Fluid Dynamics (CFD) and frame laminate design with it's Fibersim optimization program, using the only the absolutely necessary types and amounts of carbon fiber and resin for each frame. The company wastes as little material as is possible, and believes that frames are no the place for waste material. Each O2 is built with Factor's EM2 RGicarbon system, employs various amounts of three carbon fiber types: Standard Modulus, Medium Modulus, and the costly and difficult to work with High Modulus Pitch Fiber. Each is applied to it's greatest effect, in accordance with the desired properties of each frame section or tube. Due to the challenges and costs, Pitch fiber is rarely used except at the top-end of the bike world. Factor knows the process and material well, and uses Pitch fiber to it's greatest effect. That exacting process, zero waste, highly informed engineering, and optimal materials combine to deliver a lightweight frameset that you will want to ride for hours every time you clip in.

Though the O2 Disc is not an "aero road bike", Factor still applies their aerodynamic experience to the design. The tubes shapes, sizes and transitions belie this approach, but the most obvious zone to a layman's eye would be the fork, headtube, frame intersection. It starts with the Svelte fork, which has an organically blended fork crown/headtube junction, and sculpted lowers that all combine to minimize the surface area of the fork. The crown meshes perfectly with the frame. At the same time the design also elicits an incredible smooth and controlled ride quality, at a low overall weight. Both the Svelte Disc fork and O2 rear triangle easily accept 28mm road tires. Most riders will be amazed at the lateral stiffness and cornering capability, and blown away by the compliance, even over the roughest surfaces. Those characteristics reflect the material knowledge and construction genius that Factor brings to the table. The O2’s Svelte fork employs a 1⅛" to 1⅜" tapered steerer, which precisely and effortlessly glides while turning on the provided Ceramic Speed headset.

The tubeset flows outward from the headtube junction, with shapes that deliver the strength, comfort and power transfer you expect, with a sleek and refined appearance. The design is very effective for bike stability and handling in any wind, and defeats lateral torsion for rock steady power and energy transfer. The more more rounded and curved shapes combine with the judicious use of proper carbon fiber to produce the vertical compliance and smooth ride that never feels flexy or wasteful. The aerodynamic features also include the carefully positioned and executed internal cable routing system (for both mechanical and electronic systems).

The slightly sloping geometry favors speed, handling and balance you'd associate with a premium race design. A 73 degree seat tube angle is found across the board and the overall positioning is aggressive. The 56cm is built with a 152mm headtube. A 68mm bottom bracket drop will cover you in the corners and keep the bike stable at all times. Factor builds the O2 Disc with Flat Mount disc mounts and 12/142mm Thru-Axle rear, 12/100mm TA front road dropouts for improved stiffness, disc alignment and safety. The 25mm offset Factor Black Inc carbon seatpost comes standard with the frameset. A BBright bottom bracket standard is used on the frame, and Factor supplies a 24mm spindle direct BBright PF Ceramic Speed bottom bracket to keep the friction minimal.

The build on this complete bike includes the standard Factor chassis parts, and is otherwise equipped with Shimano's 11-speed Ultegra Di2 R8070 drivetrain and disc brake set. With the exception of the CeramicSpeed bottom bracket, the rest is R8070, R8050, R8000. The R8000 crankset is a 172.5, with 50-34 chainrings, which is matched with an 11-30 cassette for superlative range. The hydraulic disc brake calipers, rear derailleur, Dual Control levers, and Front Derailleur deliver the performance, while the stopping power is channeled through 160mm front / 140mm rear Ultregra RT-800 IceTech-developed, UCI approved disc rotors. The Di2 system is powered by a seatpost battery and is fully wired via the e-Tube system. The set-up, diagnostics and other important information can be accessed via the Shimano e-Tube project site or App.

A RS770 C30 Disc thru-axle wheelset with Shimano's proven carbon-laminated alloy rim carries Continental GP5000 700x25 tires and tubes, offerings peed, stability, great tire options, impressive handling with it's low-section, disc brake specific design.