FactorONE
Factor's dedicated aero road bike, which it calls the fastest it has made, built after the UCI relaxed its frame rules. Its most visible feature is a wide-stance bayonet fork with a chin fairing that steers the air spilling off the front tyre, and the integrated barstem mounts ahead of the steering axis so racers get long reach without long stems. Factor claims it is more than 8% faster than the OSTRO VAM. It clears 34 mm tyres, uses a T47 bottom bracket and is electronic-only.
- From
- €13,099$11,999€13,099
- Builds
- 7
- Sizes
- 5
- Frame weight
- —
Our verdict
Overall
out of 100, average of 6 categories
About as aggressive as a UCI-legal aero bike gets: a bayonet fork, a forward-mounted barstem for pro-style reach and Factor's claim of 8% less drag than the OSTRO VAM, with deep Black Inc wheels on every complete bike. The 380 mm-only bar, electronic-only frame, proprietary front end and very high prices narrow who it suits.
Scored Nov 2026
- + Aero-first design
- + Premium frame
- + Top-tier build kit
- − Expensive
AI-drafted from the specs on this page and reviewed before publishing. Scores are relative to every bike in the catalog when they were given, so they drop as newer bikes and parts raise the bar.
- Aero
- 95/100
- Frame
- 90/100
- Components
- 90/100
- Fit
- 72/100
- Practicality
- 60/100
- Price
- 33/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Groupset, wheels and power meter
Sizes and adjustment range
Travel, standard parts, servicing
From the cheapest complete-bike MSRP
Bike duel
Frame & platform
Frame & fork
- Frame material
- Carbon (TeXtreme, Toray and Nippon Graphite pitch-based fibre)
- Fork material
- Carbon; ONE wide-stance bayonet fork
- Frame sizes
- 47, 52, 54, 56, 58
- Colours
- Onyx Black, Nimbus Grey, Silverstone, Blush, Chrome
- Also available as
- ONE 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 type
- Disc, max rotor 160 mm front and rear
- Max rotor size
- 160 mm
- Wheel size
- 700c
- Max tire width
- 34 mm
- Bottom bracket standard
- T47A (CeramicSpeed T47A aluminium cups; bearings for DUB or 24 mm spindles)
- Front axle
- 12x100 thru-axle
- Rear axle
- 12x142 thru-axle
- Drivetrain compatibility
- Electronic only (SRAM, Shimano, Campagnolo), 1x or 2x, max chainring 54T
- Mechanical shifting possible
- No
- 1x compatible
- Yes
- Max chainring
- 54T
- Front derailleur mount
- Adjustable front derailleur mount
- Cable routing
- Internal
Bottles & storage
- Bottle mounts
- 2
- Bottle mount locations
- Black Inc aero integrated bottle cages included
Fit & adjustability
- 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 type
- ONE aero seatpost, 0 or 30 mm setback; adjustable head gives a 73.5-77° seat angle range; takes 7x7 and 7x9 rails
- Fit notes
- 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 claims
- More 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 profile
- Wide-stance bayonet fork with a chin fairing that manages the air spilling off the front wheel
Travel, maintenance & warranty
- Headset bearings
- 1-1/8 in upper and lower bearings
- Derailleur hanger
- Factor Mini-UDH
- Proprietary parts
- Integrated barstem, bayonet fork and chin fairing, ONE seatpost, Mini-UDH hanger, location-specific bottle cages
- Frame warranty
- Limited lifetime warranty
- Sold via
- Direct from factorbikes.com and through retailers
Builds & components
Highlighted rows differ between builds. Green marks the best value.
ONE Premium Package | ONE Premium Package w/ Wheels | ONE Shimano Ultegra | ONE SRAM Force w/ Power Meter | ONE Shimano Dura-Ace | ONE SRAM Red w/ Power Meter | ONE Campagnolo Super Record | |
|---|---|---|---|---|---|---|---|
| Overview | |||||||
| Price (MSRP) | €8,199$7,599€8,199 | €11,399$10,399€11,399 | €13,099$11,999€13,099 | €13,399$12,199€13,399 | €15,099$13,899€15,099 | €15,499$14,199€15,499 | €15,899$14,499€15,899 |
| Type | Frameset | Frameset | Complete bike | Complete bike | Complete bike | Complete bike | Complete bike |
| Notes | Frame package with the integrated barstem, seatpost, CeramicSpeed T47A bottom bracket (Shimano or SRAM/DUB version), aero bottle cages and a single-bolt computer mount. | The frame package plus Black Inc SIXTY TWO wheels. The Black Inc HYPER 62 wheel option costs USD 1,100 / EUR 1,199 more. | 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. | 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. | 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. | Factor lists the groupset as 'SRAM RED eTAP AXS w/ 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. | Factor lists the groupset as 'Campagnolo Super Record', 2x13-speed with a 32/48T crank. 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. |
| Drivetrain | |||||||
| Groupset | — | — | Shimano Ultegra Di2 R8100 | SRAM Force AXS E1 | Shimano Dura-Ace Di2 R9200 | SRAM Red AXS | Campagnolo Super Record 13 |
| Launched | — | — | 2021 · current generation | 2025 · current generation | 2021 · current generation | — | 2025 · current generation |
| Speeds | — | — | 12-speed | 12-speed | 12-speed | 12-speed | 13-speed |
| Electronic | — | — | Yes | Yes | Yes | Yes | Yes |
| Wireless | — | — | — | Yes | — | Yes | — |
| Drivetrain | — | — | 2x | 2x | 2x | 2x | 2x |
| Crankset | — | — | Shimano Ultegra R8100 | SRAM Force AXS E1 Power Meter | Shimano Dura-Ace R9200 | SRAM Red AXS Power Meter | Campagnolo Super Record 13 |
| Chainrings | — | — | 52/36 | 48/35 | 52/36 | 48/35 | 48/32 |
| Crank length | — | — | 165 / 170 / 172.5 (chosen at order) | 165 / 170 / 172.5 (chosen at order) | 165 / 170 / 172.5 (chosen at order) | 165 / 170 / 172.5 (chosen at order) | 165 / 170 / 172.5 (chosen at order) |
| Power meter | — | — | — | SRAM Force AXS E1 Power Meter | — | SRAM Red AXS Power Meter | — |
| Launched | — | — | — | 2025 · current generation | — | — | — |
| Bottom bracket | CeramicSpeed T47A | CeramicSpeed T47A | — | — | — | — | — |
| Standard | T47A (Shimano or SRAM/DUB version chosen at order) | T47A (Shimano or SRAM/DUB version chosen at order) | — | — | — | — | — |
| Cassette | — | — | Shimano Ultegra R8100 | SRAM Force AXS E1 | Shimano Dura-Ace R9200 | SRAM Red AXS | Campagnolo Super Record 13 |
| Range | — | — | 11-34 | 10-33 | 11-34 | 10-33 | 10-33 |
| Speeds | — | — | 12-speed | 12-speed | 12-speed | 12-speed | 13-speed |
| Brakes | |||||||
| Rotors | — | — | 160/140 mm rotors | 160 mm rotors | 160/140 mm rotors | 160 mm rotors | 160 mm rotors |
| Front rotor | — | — | 160 mm | 160 mm | 160 mm | 160 mm | 160 mm |
| Rear rotor | — | — | 140 mm | 160 mm | 140 mm | 160 mm | 160 mm |
| Wheels & tires | |||||||
| Wheelset | — | Black Inc SIXTY TWO | Black Inc SIXTY TWO | Black Inc SIXTY TWO | Black Inc SIXTY TWO | Black Inc SIXTY TWO | Black Inc SIXTY TWO |
| Front rim depth | — | 62 mm | 62 mm | 62 mm | 62 mm | 62 mm | 62 mm |
| Rear rim depth | — | 62 mm | 62 mm | 62 mm | 62 mm | 62 mm | 62 mm |
| Material | — | Carbon | Carbon | Carbon | Carbon | Carbon | Carbon |
| Notes | — | Black Inc HYPER 62 available at extra cost | Black Inc HYPER 62 available at extra cost | Black Inc HYPER 62 available at extra cost | Black Inc HYPER 62 available at extra cost | Black Inc HYPER 62 available at extra cost | Black Inc HYPER 62 available at extra cost |
| Cockpit | |||||||
| Handlebar | Factor ONE Integrated Barstem | Factor ONE Integrated Barstem | Factor ONE Integrated Barstem | Factor ONE Integrated Barstem | Factor ONE Integrated Barstem | Factor ONE Integrated Barstem | Factor ONE Integrated Barstem |
| Type | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem | One-piece bar and stem |
| Integrated stem | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
| Bar width | 380 mm | 380 mm | 380 mm | 380 mm | 380 mm | 380 mm | 380 mm |
| Widths available | 380 mm only | 380 mm only | 380 mm only | 380 mm only | 380 mm only | 380 mm only | 380 mm only |
| Bar reach | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm | 80 mm |
| Bar drop | 120 mm | 120 mm | 120 mm | 120 mm | 120 mm | 120 mm | 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 | 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 | 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 | 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 | 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 | 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 | 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 | |||||||
| Seatpost | Factor ONE Seatpost | Factor ONE Seatpost | Factor ONE Seatpost | Factor ONE Seatpost | Factor ONE Seatpost | Factor ONE Seatpost | Factor ONE Seatpost |
| Offset / setback | 0 mm or 30 mm setback, chosen at order | 0 mm or 30 mm setback, chosen at order | 0 mm or 30 mm setback, chosen at order | 0 mm or 30 mm setback, chosen at order | 0 mm or 30 mm setback, chosen at order | 0 mm or 30 mm setback, chosen at order | 0 mm or 30 mm setback, chosen at order |
| Material | Carbon | Carbon | Carbon | Carbon | Carbon | Carbon | Carbon |
| Included extras | |||||||
| Bottle cages | Black Inc Aero Integrated Bottle Cages | Black Inc Aero Integrated Bottle Cages | Black Inc Aero Integrated Bottle Cages | Black Inc Aero Integrated Bottle Cages | Black Inc Aero Integrated Bottle Cages | Black Inc Aero Integrated Bottle Cages | Black Inc Aero Integrated Bottle Cages |
ONE price & value
Where it's cheapest
MSRPs converted at ECB reference rates of 2026-10-05 (1 EUR = 1.1204 USD = 0.8472 GBP). US prices exclude sales tax, so add your state's rate before comparing.
| Build | Market | MSRP | In EUR | vs cheapest |
|---|---|---|---|---|
| ONE Premium Package | USA (USD, excl. sales tax) | $7,599 | €6,782 | cheapest |
| Europe (EUR, incl. VAT) | €8,199 | €8,199 | +21% | |
| ONE Premium Package w/ Wheels | USA (USD, excl. sales tax) | $10,399 | €9,282 | cheapest |
| Europe (EUR, incl. VAT) | €11,399 | €11,399 | +23% | |
| ONE Shimano Ultegra | USA (USD, excl. sales tax) | $11,999 | €10,710 | cheapest |
| Europe (EUR, incl. VAT) | €13,099 | €13,099 | +22% | |
| ONE SRAM Force w/ Power Meter | USA (USD, excl. sales tax) | $12,199 | €10,888 | cheapest |
| Europe (EUR, incl. VAT) | €13,399 | €13,399 | +23% | |
| ONE Shimano Dura-Ace | USA (USD, excl. sales tax) | $13,899 | €12,405 | cheapest |
| Europe (EUR, incl. VAT) | €15,099 | €15,099 | +22% | |
| ONE SRAM Red w/ Power Meter | USA (USD, excl. sales tax) | $14,199 | €12,673 | cheapest |
| Europe (EUR, incl. VAT) | €15,499 | €15,499 | +22% | |
| ONE Campagnolo Super Record | USA (USD, excl. sales tax) | $14,499 | €12,941 | cheapest |
| Europe (EUR, incl. VAT) | €15,899 | €15,899 | +23% |
Building up the ONE Premium Package
Included: Bottle cages, Bottom bracket, Handlebar, Seatpost.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Wheelset, Tires, Saddle, Pedals.
Building up the ONE Premium Package w/ Wheels
Included: Bottle cages, Bottom bracket, Handlebar, Seatpost, Wheelset.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Tires, Saddle, Pedals.
Ownership checklist
3 of 4 known checks pass. Why these checks
- ✓
Threaded bottom bracket
T47A (CeramicSpeed T47A aluminium cups; bearings for DUB or 24 mm spindles)
- ✓
UDH derailleur hanger
Factor Mini-UDH
- ✓
Standard 12×142 mm rear axle
12x142 thru-axle
- ✕
Works with mechanical shifting
ONE geometry
| 47 | 52 | 54 | 56 | 58 | |
|---|---|---|---|---|---|
| Stack | 503 mm19.8″ | 523 mm20.6″ | 542 mm21.3″ | 565 mm22.2″ | 587 mm23.1″ |
| Reach | 390 mm15.4″ | 396 mm15.6″ | 404 mm15.9″ | 412 mm16.2″ | 421 mm16.6″ |
| Seat tube angle | 76.5° | 76° | 76° | 75.5° | 75.5° |
| Head tube angle | 72.5° | 73.3° | 73.3° | 73.3° | 73.3° |
| Chainstay | 405 mm15.9″ | 405 mm15.9″ | 405 mm15.9″ | 405 mm15.9″ | 408 mm16.1″ |
| Wheelbase | 974 mm38.3″ | 974 mm38.3″ | 988 mm38.9″ | 1,003 mm39.5″ | 1,022 mm40.2″ |
| BB drop | 77 mm3″ | 77 mm3″ | 75 mm3″ | 75 mm3″ | 75 mm3″ |
| Fork offset | 48 mm1.9″ | 43 mm1.7″ | 43 mm1.7″ | 43 mm1.7″ | 43 mm1.7″ |
| Trail | 57.4 mm2.3″ | 58 mm2.3″ | 58 mm2.3″ | 58 mm2.3″ | 58 mm2.3″ |
| Wheel size | 700c | 700c | 700c | 700c | 700c |
Side view
Drawn to scale (how to read it).
How the geometry rides
The ONE in size 54 against the middle size of 29 other bikes: tendencies from geometry, not a ride review (how to read this).
- Trail58 mm2.3″
shortestlonger than 28% of 29 bikeslongest
- Wheelbase988 mm38.9″
shortestlonger than 62% of 65 bikeslongest
- Chainstay405 mm15.9″
shortestlonger than 8% of 73 bikeslongest
Short chainstays: a compact, responsive rear end.
Good to know
Design
Factor's engineers say they worked with the UCI's experts during development to get the most from the relaxed rules, and used a 3D-printed drop-bar HANZŌ as their wind-tunnel reference because the ONE beat their existing road bike by so much.
SourceRacing
On the UCI list of approved framesets as 'ONE / FM310' since 30 May 2025 (sizes 47 to 58).
SourceHistory
A prototype ONE won stage 5 of the 2025 Critérium du Dauphiné under Jake Stewart before the bike was announced. Factor says the idea started with a request from Alex Dowsett for a bike that could hold the front of the peloton at sprint lead-out speeds.
SourceVersions
Factor positions the ONE as its 'Race Aero' bike above the OSTRO VAM all-rounder, and sells the same frame with a time-trial bar as the ONE SP.
Source
ONE FAQ
Is the Factor ONE UCI legal?+
Yes. The Factor ONE is UCI legal, so it can be raced in UCI-sanctioned road races.
How much does the Factor ONE cost?+
Manufacturer prices (MSRP): €8,199–€15,899 / $7,599–$14,499 across 7 listed builds and framesets: ONE Premium Package, ONE Premium Package w/ Wheels, ONE Shimano Ultegra, ONE SRAM Force w/ Power Meter, ONE Shimano Dura-Ace, ONE SRAM Red w/ Power Meter and ONE Campagnolo Super Record.
What sizes does the Factor ONE come in?+
5 sizes: 47, 52, 54, 56 and 58.
What is the tire clearance of the Factor ONE?+
Up to 34 mm tires on 700c wheels.
Which groupsets are compatible with the Factor ONE?+
Drivetrain compatibility: Electronic only (SRAM, Shimano, Campagnolo), 1x or 2x, max chainring 54T. Mechanical groupsets are not supported. 1x drivetrains are supported. The largest chainring that fits is 54T. Bottom bracket: T47A (CeramicSpeed T47A aluminium cups; bearings for DUB or 24 mm spindles).
What builds of the Factor ONE are available?+
ONE Shimano Ultegra: Shimano Ultegra Di2 R8100; ONE SRAM Force w/ Power Meter: SRAM Force AXS E1; ONE Shimano Dura-Ace: Shimano Dura-Ace Di2 R9200; ONE SRAM Red w/ Power Meter: SRAM Red AXS; ONE Campagnolo Super Record: Campagnolo Super Record 13.
What warranty does the Factor ONE frame have?+
Limited lifetime warranty
Is the Factor ONE aerodynamic?+
More than 8% faster than the OSTRO VAM, with the advantage sustained from 0 to 15° yaw (Factor) (CFD iterations followed by wind-tunnel testing against a 3D-printed drop-bar HANZŌ ('HANZO Road') reference)
Sources
- https://factorbikes.com/bikes/one
- https://factorbikes.com/news/factor-one
- https://factorbikes.com/bike-builder/one-premium-package
- https://factorbikes.com/bike-builder/one-premium-package-w-wheels
- https://factorbikes.com/bike-builder/one-shimano-ultegra
- https://factorbikes.com/bike-builder/one-sram-force-w-power-meter
- https://factorbikes.com/bike-builder/one-shimano-dura-ace
- https://factorbikes.com/bike-builder/one-sram-red-w-power-meter
- https://factorbikes.com/bike-builder/one-campy-super-record
- https://eu.factorbikes.com/bike-builder/one-shimano-dura-ace
- https://assets.ctfassets.net/761l7gh5x5an/7jA9krKzzy3lRXPzlm4uyn/7982d7114b9d62978cb87876ea476535/58780c70-6247-4448-8384-b145fa30aba9.pdf
Factor ONE data last updated · How the data is checked ·