FactorONE SP
The ONE SP is Factor's ONE aero road frame fitted with a dedicated time-trial and triathlon cockpit, the ONE SP Bar, which bolts to the fork head with four bolts and routes cables internally. Factor pitches it for riders who want road-bike handling and low weight with an aero position, such as on hilly time trials, and it has been raced at the Ironman 70.3 World Championship. It keeps the ONE's 34 mm tyre clearance, T47 bottom bracket and bottom-bracket Di2 battery.
- From
- €13,899$12,799€13,899
- Builds
- 4
- Sizes
- 5
- Frame weight
- —
Our verdict
Overall
out of 100, average of 6 categories
A light, road-handling aero frame turned into a TT and triathlon bike with its own integrated bar, aimed at hilly courses where a full TT bike is heavy. There is no bento box or built-in hydration, Factor publishes no pad stack or reach figures, and it costs as much as a flagship tri bike.
Scored Nov 2026
- + Premium frame
- + Top-tier build kit
- + Aero-first design
- − 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
- 84/100
- Frame
- 88/100
- Components
- 88/100
- Hydration & storage
- 55/100
- Fit
- 62/100
- Practicality
- 58/100
- Price
- 27/100
Aero claims and front-end integration
Carbon grade, weight and warranty
Groupset, wheels and power meter
Not counted in the overall score for time-trial bikes: UCI rules limit integrated hydration and storage. Hydration and storage in the frame
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
- Chrome, Onyx Black, Nimbus Grey, Silverstone
- Also available as
- ONE: the same frame as a drop-bar aero road bike
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
- Electronic battery location
- Bottom bracket
Hydration & storage
- Bottle mounts
- 2
- Bottle mount locations
- Black Inc aero integrated bottle cages included
Fit & adjustability
- Aerobar system
- Factor ONE SP Bar, attached to the fork head with a four-bolt interface
- Pad stack adjustment range
- Optional 10 mm at the bar attachment, plus up to 35 mm of extension stack in 5 mm steps
- 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
- Factor 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.
Aerodynamics
- Manufacturer aero claims
- Factor says it pairs the ONE's aerodynamics with a time-trial position; no figures published
- 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
- ONE SP Bar, 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 SP Premium Package | ONE SP Premium Package w/ Wheels | ONE SP SRAM Force w/ Power Meter | ONE SP SRAM Red w/ Power Meter | |
|---|---|---|---|---|
| Overview | ||||
| Price (MSRP) | €8,899$8,099€8,899 | €11,999$10,999€11,999 | €13,899$12,799€13,899 | €16,099$14,699€16,099 |
| Type | Frameset | Frameset | Complete bike | Complete bike |
| Notes | Frame package with the ONE SP Bar, 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 (BI62) wheels. The Black Inc HYPER 62 wheel option costs USD 1,100 / EUR 1,199 more. | 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 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. |
| Drivetrain | ||||
| Groupset | — | — | SRAM Force AXS E1 | SRAM Red AXS |
| Launched | — | — | 2025 · current generation | — |
| Speeds | — | — | 12-speed | 12-speed |
| Electronic | — | — | Yes | Yes |
| Wireless | — | — | Yes | Yes |
| Drivetrain | — | — | 2x | 2x |
| Crankset | — | — | SRAM Force AXS E1 Power Meter | SRAM Red AXS Power Meter |
| Chainrings | — | — | 48/35 | 48/35 |
| Crank length | — | — | 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 | — | — | SRAM Force AXS E1 | SRAM Red AXS |
| Range | — | — | 10-33 | 10-33 |
| Speeds | — | — | 12-speed | 12-speed |
| Brakes | ||||
| Rotors | — | — | 160 mm rotors | 160 mm rotors |
| Front rotor | — | — | 160 mm | 160 mm |
| Rear rotor | — | — | 160 mm | 160 mm |
| Wheels & tires | ||||
| Wheelset | — | Black Inc SIXTY TWO | Black Inc SIXTY TWO | Black Inc SIXTY TWO |
| Front rim depth | — | 62 mm | 62 mm | 62 mm |
| Rear rim depth | — | 62 mm | 62 mm | 62 mm |
| Material | — | 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 |
| Cockpit | ||||
| Aerobar system | Factor ONE SP Bar | Factor ONE SP Bar | Factor ONE SP Bar | Factor ONE SP Bar |
| Integrated with frame | Yes | Yes | Yes | Yes |
| Pad stack adjustment | Optional 10 mm at the bar attachment; extensions up to 35 mm higher in 5 mm steps | Optional 10 mm at the bar attachment; extensions up to 35 mm higher in 5 mm steps | Optional 10 mm at the bar attachment; extensions up to 35 mm higher in 5 mm steps | Optional 10 mm at the bar attachment; extensions up to 35 mm higher in 5 mm steps |
| Material | Carbon (high modulus) | Carbon (high modulus) | Carbon (high modulus) | Carbon (high modulus) |
| Saddle & seatpost | ||||
| 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 |
| Material | 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 |
ONE SP 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 SP Premium Package | USA (USD, excl. sales tax) | $8,099 | €7,229 | cheapest |
| Europe (EUR, incl. VAT) | €8,899 | €8,899 | +23% | |
| ONE SP Premium Package w/ Wheels | USA (USD, excl. sales tax) | $10,999 | €9,817 | cheapest |
| Europe (EUR, incl. VAT) | €11,999 | €11,999 | +22% | |
| ONE SP SRAM Force w/ Power Meter | USA (USD, excl. sales tax) | $12,799 | €11,424 | cheapest |
| Europe (EUR, incl. VAT) | €13,899 | €13,899 | +22% | |
| ONE SP SRAM Red w/ Power Meter | USA (USD, excl. sales tax) | $14,699 | €13,119 | cheapest |
| Europe (EUR, incl. VAT) | €16,099 | €16,099 | +23% |
Building up the ONE SP Premium Package
Included: Aerobar system, Bottle cages, Bottom bracket, Seatpost.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Wheelset, Tires, Saddle, Pedals.
Building up the ONE SP Premium Package w/ Wheels
Included: Aerobar system, Bottle cages, Bottom bracket, Seatpost, Wheelset.
Still to buy: Groupset, Crankset, Cassette, Chain, Brake calipers, Tires, Saddle, Pedals.
Ownership checklist
3 of 4 known checks pass, 3 not published by Factor. 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
- ?
Fits third-party aerobars
Factor ONE SP Bar, attached to the fork head with a four-bolt interface
- ?
Rear disc wheel compatible
- ?
Fit kept when packed
ONE SP geometry
The manufacturer uses the same geometry as the ONE.
| 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 & pad range
Drawn to scale (how to read it).
How the geometry rides
The ONE SP in size 54 against the middle size of 8 other bikes: tendencies from geometry, not a ride review (how to read this).
- Trail58 mm2.3″
shortestlonger than 0% of 8 bikeslongest
Shorter trail than most: steering reacts quicker, so it can feel nervous on the extensions in crosswinds.
- Wheelbase988 mm38.9″
shortestlonger than 41% of 17 bikeslongest
- Chainstay405 mm15.9″
shortestlonger than 31% of 21 bikeslongest
Good to know
Racing
The ONE frame is on the UCI list of approved framesets ('ONE / FM310', since 30 May 2025), but Factor doesn't say whether the ONE SP with its time-trial bar meets UCI time-trial rules, so UCI legality is left open.
SourceVersions
Factor lists the ONE SP in its time-trial range alongside the triathlon-only SLiCK and the HANZŌ TT bike. It uses the ONE frame; Factor's build pages show the ONE's geometry for it.
Source
ONE SP FAQ
How much does the Factor ONE SP cost?+
Manufacturer prices (MSRP): €8,899–€16,099 / $8,099–$14,699 across 4 listed builds and framesets: ONE SP Premium Package, ONE SP Premium Package w/ Wheels, ONE SP SRAM Force w/ Power Meter and ONE SP SRAM Red w/ Power Meter.
What sizes does the Factor ONE SP come in?+
5 sizes: 47, 52, 54, 56 and 58.
What is the tire clearance of the Factor ONE SP?+
Up to 34 mm tires on 700c wheels.
Which groupsets are compatible with the Factor ONE SP?+
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 SP are available?+
ONE SP SRAM Force w/ Power Meter: SRAM Force AXS E1; ONE SP SRAM Red w/ Power Meter: SRAM Red AXS.
What warranty does the Factor ONE SP frame have?+
Limited lifetime warranty
Is the Factor ONE SP aerodynamic?+
Factor says it pairs the ONE's aerodynamics with a time-trial position; no figures published
Sources
- https://factorbikes.com/bikes/one-sp
- https://factorbikes.com/news/the-one-sp-racing-kona
- https://factorbikes.com/bike-builder/one-sp-premium-package
- https://factorbikes.com/bike-builder/one-sp-premium-package-w-wheels
- https://factorbikes.com/bike-builder/one-sp-sram-force-w-power-meter
- https://factorbikes.com/bike-builder/one-sp-sram-red-w-power-meter
- https://eu.factorbikes.com/bike-builder/one-sp-sram-red-w-power-meter
- https://assets.ctfassets.net/761l7gh5x5an/7jA9krKzzy3lRXPzlm4uyn/7982d7114b9d62978cb87876ea476535/58780c70-6247-4448-8384-b145fa30aba9.pdf
Factor ONE SP data last updated · How the data is checked ·