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Factor Bike One S Road Frameset - 2017

Factor Bike One S Road Frameset - 2017
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Item # FCB0002

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  • Blue, 54cm ($4,999.00)
  • Blue, 56cm ($4,999.00)
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Alleviate aerocide.

The "S" in Factor Bikes' One-S Road Frameset may well refer to "steerer," as in: The One-S's fork has a traditional steerer tube instead of the unconventional OTIS fork on the brand's flagship One. Despite the different fork, the One-S incorporates the same Twin Vane bisected down tube hiding behind the One's OTIS fork. The Twin Vane down tube features a lengthwise cutout that Factor credits with a 100g reduction in air resistance forces because it gathers and manages the unruly turbulence rolling off of the front wheel. Factor refers to this turbulence as "dirty" air, and the Twin Vane serves as the aerodynamic equivalent of a cleaner to tidy up the crime scene after the fork and front wheel commit drag-inducing aerocide.

Factor's willingness to inflict violence on industry axioms isn't a case of iconoclastic vandals breaking things just for the sake of breaking things. Rather, the unconventional design elements of the One-S are the result of a collaboration between some big names in the cycling industry and a big name in automotive aerodynamics. We'll get into the details below, but it's worth interjecting here that, during its debut under One Pro Cycling's Domagalski, the One-S was ridden to two stage victories at Korea's 2.1 category stage race.

Factor is led by green jersey-winner Baden Cooke and Rob Gitelis, a carbon manufacturing guru who also happens to be a longtime two-wheel fetishist. The pair acquired the brand from bf1systems in order to adapt the erstwhile non-race-legal technology of models like the Vis Vires and 001 into race-legal designs. To help with that transition, the pair have developed a strong supporting cast that includes Matt Prior, a multisport enthusiast and the head of One Pro Cycling, and David Millar, the cycling world's most fashion-forward rouleur and the latest heir to the Millar engine. While the latter's own father remains one of the greatest Anglophone climbers, Factor's supporting cast is far more dedicated to the pure speed of sprints and TTs. The One-S bears this focus out, but—despite the impressive names behind the brand—Factor didn't do it alone.

The point of departure was bf1systems, a powerhouse of aerodynamics and the brains behind many of Europe's biggest auto-racing names. We'll avoid listing the entire roster here, but it's every bit as impressive as Factor's list of co-owners. Think back to the posters on your childhood bedroom walls or the images on your grade school folders and notebooks; chances are good those high-horsepower machines began life as a gleam in the eye of BF1's engineering team.

Aside from the Twin Vane down tube discussed above, the frameset's aerodynamic features include the bullet-nose face and truncated tailing edge that have come to define top-end tube shapes. The shape babysits airflow from the point the frame encounters it till long after it's detached and dissipated into wake. The abbreviated rear face is especially important as it reduces the negative vacuum of trailing drag that traditional tube shapes produce, but it doesn't turn into a destabilizing parachute when crosswinds and road conditions shift the yaw angle outside of a NACA profile's near-zero comfort zone.

The aerodynamic features extend to such subtleties as a hidden seatpost clamp, direct-mount rear brake caliper, tucked-away seatstays, internal cable routing, a Di2 junction box, and the inclusion of an integrated stem/bar unit that's designed to work as part of a drag-reduction system with frame and rider. Frankly, we expect this roster of wind-cheating features from high-end aerodynamic road frames. And given Factor's penchant for going above and beyond what's expected, it's no surprise that they're all represented here.

What is a surprise is that the aerodynamics don't come at the cost of comfort. The One-S isn't as buttery smooth as a classic, lugged steel frame or a heavy, carbon cobbles machine, but it does transmit a lot less harshness than the non-traditional tube shapes and seatpost would suggest. Maybe this is because of the low chainstay juncture and shape, or maybe it has something to do with the carbon lay-up. Given co-owner Gitelis' 15+ years in manufacturing, we suspect the latter might play a significant role.

The frame's contradictory balance of aerodynamics, efficient power transfer, and comfort is equal parts tube design and carbon lay-up. Factor builds the One-S with three different carbon moduli, balancing the vibration damping and compliant durability of lower and middle moduli with the unyielding stiffness of Pitch Fibre, a material that is as unabashedly stiff and light as its name is unabashedly British.

Factor isn't shy about claiming that Pitch Fibre is the lightest, stiffest material that can be shaped into a bike frame, so you might assume three things here: 1) Pitch Fibre is extremely difficult to work with, 2) it's very expensive, and 3) Factor jealously guards the exact details of its lay-up schedule. You'd be correct on all fronts. The one insight Factor gives into its process is the use of a program called Fiberism, which Factor uses to "ensure that we put the waste into the garbage can and not into the frame." Fiberism helps the brand keep material to a minimum, resulting in fabric cuts and construction as discerningly meticulous as sartorially gifted brand-ambassador Millar's wardrobe.

The included accessories demonstrate the same care. In addition to the fork, bar/stem unit, and seatpost, Factor packages the One-S with a Ceramic Speed bottom bracket, a Ceramic Speed headset, a compression plug, steering tube spacers, a spare derailleur hanger, bar tape, and a few other unlooked for but indispensable items.

  • An unconventional road racing frameset with an impressive pedigree
  • Aerodynamic engineering empowers long-range solo attacks
  • Twin Vane down tube manages airflow coming off front wheel
  • Modified NACA tube shapes are faster and more stable
  • Integrated rear brake and seatpost clamp further reduce drag
  • Meticulous carbon lay-up capitalizes weight loss and stiffness
  • Engineered in partnership with a leading motorsport firm
  • Factor Bikes breaks with tradition in pursuit of on-road gains

Tech Specs

Frame Material:
EM2 RGicarbon
Wheel Size:
700 c
Single Bayonet
Fork Material:
EM2 RGi Carbon Fiber
Head Tube Diameter:
[upper] 1-1/8, [lower] size-specific
Headset Included:
yes, Ceramic Speed
Bottom Bracket Type:
BB386EVO Ceramic Speed
Cable Routing:
internal sheathed
Front Derailleur Mount:
Brake Type:
rim, [rear] integrated
Factor Bikes
Seat Collar:
9mm quick-release
Recommended Use:
road cycling
Manufacturer Warranty:
limited lifetime

More One-S builds

Geometry Chart

Factor Bike

Geometry Chart



Seat Tube


Effective Top Tube






Head Tube


Head Tube Angle


Seat Tube Angle


Bottom Bracket Drop




51cm 48.3cm 53cm 51.9cm 38.4cm 10.3cm 72.5o 74o 7cm 40.3cm 90mm
54cm 51.2cm 54.7cm 54.3cm 38.9cm 12.6cm 73o 73.5o 7cm 40.3cm 110mm
56cm 52.8cm 56.2cm 56.3cm 39.8cm 14.6cm 73.25o 73.5o 7cm 40.3cm 110mm
58cm 54.3cm 58cm 58.3cm 40.5cm 16.6cm 73.5o 73o 7cm 40.7cm 120mm
61cm 55.7cm 60cm 60.8cm 41.4cm 19.1cm 73.75o 72.75o 7cm 40.7cm 120mm

Reviews & Community


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  • Familiarity: I've used it several times

The first thing that stood out to me about this bike is the way it looked. I had never seen anything like it and I immediately knew I was going to spend my spring working in as many rides on this thing as I could.

I had never thought of the resistance caused by air that's deflected off of the down tube... but Factor did! So, they split the down tube, allowing for air to pass through without any additional resistance. I assume it's not only the split down tube that makes this bike fast (the entire bike is designed with aerodynamics in mind), but I must also assume that it certainly doesn't hurt.

This bike performed amazingly while pedaling, but one of my favorite things to do on this bike was to find a steep, straight descent, drop down and just watch my speed increase without the need for pedaling. This bike is seriously fast! I believe this is the fastest bike I've ridden all year.

With such a unique design I was obviously skeptical about the feel. I figured that a split down tube must have some sort of flex. However, I did plenty of rides on this bike that tested its ability to climb and I'm very impressed with the stiffness in this frame.

The geometry is race oriented, the structure is strong and the bike is just plain fast. I had a blast riding this bike and I would highly recommend this bike for anyone who is for a performance oriented bike with an impeccable design.

Please feel free to hit me up to discuss my experience on the bike, sizing or fit!


Hi Kody Gubler,

I'm a rider from Thailand. Thank you for sharing your experience. I ordered Factor One frame set from my LBS.

The review sounds like a 5 to me. So just wondering what is a 1 point deduction is? Thanks.