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Factor One-S Frameset

  • Image for Illustration purposes only
  • Developed as a total system, the ONE-S has been created in collaboration with bf1 systems

Was: £3,750

Now: £2,550


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Product Information

Factor One-S Frameset

The ONE-S takes Factor Bikes’ iconic Twin Vane split downtube mainframe as used on the premier ONE model and combines it with a pared-back Shank fork which shares the same aerodynamic lower sections as the ONE’s dual clamp OTIS fork but with a traditional, internal steerer to deliver a lighter, more compliant but still massively aerodynamic front end, together with a direct-mount dual-bolt brake interface. 

Full Specification


Developed as a total system, the ONE-S has been created in collaboration with aerodynamic maestros bf1systems – one of the premier providers of wind-tunnel and downforce measurement to Ferrari, Aston Martin, Lamborghini, Maserati and multiple F1, Moto GP and WRC teams. Together, they have created a masterful blend of speed, style and awe-inspiring ride quality in the ONE-S.

As with the ONE, the fork works symbiotically with the iconic Twin Vane split downtube to take the dirty turbulent air from the front wheel and funnel it through – rather than around – the downtube to deliver a meaningful aerodynamic advantage that will help deliver you to your goals, first. Factor's standard internal Shank fork allows you to fine tune bike fit for a super low or more upright cockpit set up using standard bars and stem.

Tested and developed in the fires of competition, the ONE-S – like all models in the Factor Bikes collection – has been forged by their professional team riders, former world champion track racers, and by both Baden Cooke and David Millar. The result is an insatiably addictive ride that delivers maximum speed with a class-leading ride quality so you can ride closer to the edge, more of the time.


  • UCI legal
  • Factor's frame laminate design and manufacturing process ensures that they put the waste into the garbage can and not into the frame; using a computer programme called fibresim, 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 ONE-S 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 Factor use it simply because it’s the lightest and stiffest carbon available for bike frames that can be manipulated.
  • Direct mount rear brake is tucked behind the bottom bracket for optimum aerodynamics.
  • Fully sleeved cable routings ensure crisp, long lasting shifting and braking performance, improve aerodynamics and aesthetics and ensure effortless practicality with hassle free cable assembly and maintenance.
  • The ONE-S has ample tyre clearance to allow the comfort and performance benefits that come from using wider, higher profile tyres – up to 25c.
  • The hidden seatpost clamp contributes to the ONE-S’s clean and uncluttered aesthetic and improves aerodynamics. 
  • The BB386EVO 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 crank.


Frame - RGi Carbon construction, tapered/shaped 1-1/8" to size-specific lower head tube, compact pro race geometry, internal cable routing
Fork - RGi Carbon, single bayonet, full monocoque, size-specific taper
Headset - 1-1/8" upper, size-specific lower, Ceramic Speed cartridge bearings, Factor top cap
Stem - FSA
Handlebars - FSA

Size Guide

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