AeroAddicts

Factor · model family

Factor ONE

Factor's aero platform launched in December 2025: the ONE drop-bar aero road bike and the ONE SP, the same frame with a time-trial and triathlon bar.

Generations

What changed from one generation to the next. Useful when you're weighing a used bike against a new one.

  1. 2025-12

    ONE (2025)

    ONEONE SP (TT/tri)

    • Wide-stance bayonet fork with a chin fairing, designed after the UCI relaxed its frame rules
    • Integrated barstem mounted ahead of the steering axis for long reach without long stems
    • More than 8% faster than the OSTRO VAM (Factor)
    • 34 mm tyre clearance, T47 bottom bracket, Mini-UDH
    • Prototype won a stage of the 2025 Critérium du Dauphiné
    Source

Variants side by side

Each variant is shown with its first complete build. Pick other builds on the compare page.

ONE variants
ONE SP (TT/tri)ONE
Overview
BrandFactorFactor
BuildONE SP SRAM Force w/ Power MeterONE Shimano Ultegra
Build notesThe Black Inc HYPER 62 wheel option costs USD 1,100 / EUR 1,199 more. Frame colour, size, crank length and seatpost setback are chosen at order.No power meter. The Black Inc HYPER 62 wheel option costs USD 1,100 / EUR 1,199 more. Frame colour, size, crank length and seatpost setback are chosen at order.
Price (MSRP)€13,899$12,799€13,899€13,099$11,999€13,099
Model year20262026
GenerationONE (2025)ONE (2025)
Launched—2025-12
DisciplineTime trialAero road
UCI legalNot statedYes
Verdict (out of 100)
Overall score6873
Aero8495
Frame8890
Components8890
Hydration & storage55—
Fit6272
Practicality5860
Price2733
Frame & fork
Frame materialCarbon (TeXtreme, Toray and Nippon Graphite pitch-based fibre)Carbon (TeXtreme, Toray and Nippon Graphite pitch-based fibre)
Fork materialCarbon; ONE wide-stance bayonet forkCarbon; ONE wide-stance bayonet fork
Frame sizes47, 52, 54, 56, 5847, 52, 54, 56, 58
ColoursChrome, Onyx Black, Nimbus Grey, SilverstoneOnyx Black, Nimbus Grey, Silverstone, Blush, Chrome
Also available asONE: the same frame as a drop-bar aero road bikeONE SP: the same frame with the ONE SP time-trial/triathlon bar
UCI frame approval—Approved 30 May 2025 as 'ONE / FM310' (frame and fork), sizes 47 - 58 (5), code FACTOR-006 (UCI list version 2026.10.02)
Compatibility & standards
Brake typeDisc, max rotor 160 mm front and rearDisc, max rotor 160 mm front and rear
Max rotor size160 mm160 mm
Wheel size700c700c
Max tire width34 mm34 mm
Bottom bracket standardT47A (CeramicSpeed T47A aluminium cups; bearings for DUB or 24 mm spindles)T47A (CeramicSpeed T47A aluminium cups; bearings for DUB or 24 mm spindles)
Front axle12x100 thru-axle12x100 thru-axle
Rear axle12x142 thru-axle12x142 thru-axle
Drivetrain compatibilityElectronic only (SRAM, Shimano, Campagnolo), 1x or 2x, max chainring 54TElectronic only (SRAM, Shimano, Campagnolo), 1x or 2x, max chainring 54T
Mechanical shifting possibleNoNo
1x compatibleYesYes
Max chainring54T54T
Front derailleur mountAdjustable front derailleur mountAdjustable front derailleur mount
Cable routingInternalInternal
Electronic battery locationBottom bracket—
Hydration & storage
Bottle mounts22
Bottle mount locationsBlack Inc aero integrated bottle cages includedBlack Inc aero integrated bottle cages included
Fit & adjustability
Aerobar systemFactor ONE SP Bar, attached to the fork head with a four-bolt interface—
Pad stack adjustment rangeOptional 10 mm at the bar attachment, plus up to 35 mm of extension stack in 5 mm steps—
Cockpit—One-piece Factor integrated barstem; the bar mount is separated from the steering axis so long reach doesn't need a long stem
Seatpost typeONE aero seatpost, 0 or 30 mm setback; adjustable head gives a 73.5-77° seat angle range; takes 7x7 and 7x9 railsONE aero seatpost, 0 or 30 mm setback; adjustable head gives a 73.5-77° seat angle range; takes 7x7 and 7x9 rails
Fit notesFactor quotes extensive reach, width and rotation adjustment for the arm pads, and a BTA accessory holder and Black Inc computer mount come with the bar. The frame keeps the ONE's road geometry; Factor publishes no pad stack or reach figures.The barstem comes only 380 mm wide, with 80 mm reach and 120 mm drop, in five lengths (sizes 1-5, equal to 110-150 mm stems) and three high-rise versions with 20 mm more stack. Up to 15 mm of spacers fit, giving 35 mm of shifter-height range in all. Factor says the steep nominal seat angle still gives the same effective fit as the OSTRO VAM, and that every size has the same steering geometry, which avoids toe overlap on small frames.
Aerodynamics
Manufacturer aero claimsFactor says it pairs the ONE's aerodynamics with a time-trial position; no figures publishedMore than 8% faster than the OSTRO VAM, with the advantage sustained from 0 to 15° yaw (Factor)
Testing method—CFD iterations followed by wind-tunnel testing against a 3D-printed drop-bar HANZŌ ('HANZO Road') reference
Tube profileWide-stance bayonet fork with a chin fairing that manages the air spilling off the front wheelWide-stance bayonet fork with a chin fairing that manages the air spilling off the front wheel
Travel, maintenance & warranty
Headset bearings1-1/8 in upper and lower bearings1-1/8 in upper and lower bearings
Derailleur hangerFactor Mini-UDHFactor Mini-UDH
Proprietary partsONE SP Bar, bayonet fork and chin fairing, ONE seatpost, Mini-UDH hanger, location-specific bottle cagesIntegrated barstem, bayonet fork and chin fairing, ONE seatpost, Mini-UDH hanger, location-specific bottle cages
Frame warrantyLimited lifetime warrantyLimited lifetime warranty
Sold viaDirect from factorbikes.com and through retailersDirect from factorbikes.com and through retailers
Drivetrain
GroupsetSRAM Force AXS E1Shimano Ultegra Di2 R8100
Launched2025 · current generation2021 · current generation
Speeds12-speed12-speed
ElectronicYesYes
WirelessYes—
Drivetrain2x2x
CranksetSRAM Force AXS E1 Power MeterShimano Ultegra R8100
Chainrings48/3552/36
Crank length165 / 170 / 172.5 (chosen at order)165 / 170 / 172.5 (chosen at order)
Power meterSRAM Force AXS E1 Power Meter—
Launched2025 · current generation—
CassetteSRAM Force AXS E1Shimano Ultegra R8100
Range10-3311-34
Speeds12-speed12-speed
Brakes
Rotors160 mm rotors160/140 mm rotors
Front rotor160 mm160 mm
Rear rotor160 mm140 mm
Wheels & tires
WheelsetBlack Inc SIXTY TWOBlack Inc SIXTY TWO
Front rim depth62 mm62 mm
Rear rim depth62 mm62 mm
MaterialCarbonCarbon
NotesBlack Inc HYPER 62 available at extra costBlack Inc HYPER 62 available at extra cost
Cockpit
Aerobar systemFactor ONE SP Bar—
Integrated with frameYes—
Pad stack adjustmentOptional 10 mm at the bar attachment; extensions up to 35 mm higher in 5 mm steps—
MaterialCarbon (high modulus)—
Handlebar—Factor ONE Integrated Barstem
Type—One-piece bar and stem
Integrated stem—Yes
Bar width—380 mm
Widths available—380 mm only
Bar reach—80 mm
Bar drop—120 mm
Notes—Five lengths (1-5, equivalent to 110-150 mm stems) and three high-rise versions (1H-3H) with 20 mm more stack, chosen at order
Saddle & seatpost
SeatpostFactor ONE SeatpostFactor ONE Seatpost
Offset / setback0 mm or 30 mm setback, chosen at order0 mm or 30 mm setback, chosen at order
MaterialCarbonCarbon
Included extras
Bottle cagesBlack Inc Aero Integrated Bottle CagesBlack Inc Aero Integrated Bottle Cages
Geometry (smallest – largest size)
Sizes47, 52, 54, 56, 5847, 52, 54, 56, 58
Stack503–587 mm19.8–23.1″503–587 mm19.8–23.1″
Reach390–421 mm15.4–16.6″390–421 mm15.4–16.6″
Seat tube angle75.5–76.5°75.5–76.5°
Head tube angle72.5–73.3°72.5–73.3°
Chainstay405–408 mm15.9–16.1″405–408 mm15.9–16.1″
Wheelbase974–1,022 mm38.3–40.2″974–1,022 mm38.3–40.2″
BB drop75–77 mm3–3″75–77 mm3–3″
Fork offset43–48 mm1.7–1.9″43–48 mm1.7–1.9″
Trail57.4–58 mm2.3–2.3″57.4–58 mm2.3–2.3″
Wheel size700c700c

Geometry overlay

Your positionYour position (optional)

Drawn to scale (how to read it).

ONE SP (TT/tri) · 54ONE · 54