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International
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Origine sells and ships its bikes worldwide.
Taxes and delivery charges will be indicated when you choose your delivery option or will be calculated on the quote, if applicable.

Origine sells and ships its bikes worldwide.
Taxes and delivery charges will be indicated when you choose your delivery option or will be calculated on the quote, if applicable.

Théorème FS TACT Edition B1 Zoom

The answers to your questions

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Tips before purchasing

Choosing a bike depends first and foremost on how you ride, your favourite terrain, your riding position and your expectations in terms of comfort and performance.

To help you, the Origine Bike Finder asks you a few questions about your cycling habits and preferences. It then guides you towards the models best suited to your needs.

If you’d like some guidance with your choice, you can also speak to a technical adviser by telephone, via video call or in person at the Rouvignies factory: Book an appointment.
The Gravel is designed for more versatile use. Its geometry and build options mean it can be ridden on both roads and trails.

It also offers greater options for carrying luggage, making it suitable for travel, bikepacking and ultra-distance riding.
All Origine models are designed to be used by both women and men. The entire Origine range is therefore unisex.

In fact, our approach is based on bespoke customisation rather than a specific range. You can adjust many aspects of your bike to suit your body shape: frame size, stem length, handlebar width, crank length, saddle setback and handlebar height.
Carbon fibre generally helps to reduce weight and improve vibration damping. It is particularly suitable when performance and comfort are the top priorities.

Aluminium offers a robust and durable solution, particularly suited to versatile use and travel.

The choice therefore depends above all on how you use your bike, your priorities and your budget.
A bike that’s tailored to your body shape is essential for your comfort, riding enjoyment and performance.

There are several ways to set your bike up:

1/ You already know your settings
You can choose the frame size, stem length, handlebar width, handlebar height, crank length and saddle width.

2/ You’d like some guidance
Our Size Calculator will recommend the frame size and key components based on a few simple measurements.
You can also select the ‘Choose sizes later’ option when placing your order. A technical adviser will contact you within 48 working hours to assist you.

3/ You already have a posture analysis
Please also select ‘Choose sizes later’, then send us your posture analysis or the settings for your current bike. We’ll adjust your configuration accordingly.
You can send your posture assessment to our team at: conseils@origine-cycles.com.

Our technical advisers will be able to take your measurements into account to tailor your setup.
The Sport position is designed for regular cyclists and those looking for a more aerodynamic position. The recommended handlebar height is lower.

The Comfort position favours a more upright riding position, particularly for occasional cyclists or those cycling long distances.
As a guide, Origine recommends:
  • under 1.70 m: 170 mm
  • from 1.70 m to 1.85 m: 172.5 mm
  • over 1.85 m: 175 mm
These figures are general recommendations. The appropriate length may also depend on your body type and how you use the product.
Origine does not offer non-standard geometry.

However, you can adjust a number of components to suit your body shape: handlebars, stem, seatpost, saddle, crankset and head tube height.
In accordance with the technical specifications set out in the FAQ, the bikes are designed and guaranteed for a maximum rider weight of 110 kg, including equipment.
The weight shown in the configurator is based on a size S frame.

You should allow for an extra 75 g per size.
Using the configurator, build your bike and then click ‘Save’.

Enter your email address to receive a copy of your configuration.
Log in to your customer portal and go to the My settings section.
No, a complete Origine bike comes with all the components required for it to function properly and safely.

Only the saddle and pedals may be missing from the order.
With the ‘Colour on Demand’ option, you can specify a RAL code or an automotive paint code in the comments section of your order.

Certain finishes, such as chrome or glitter finishes, cannot be produced.
Your bike’s suspension is preset at the factory based on the weight you provided when you created your account.
It is possible to use a trailer with the Gravel Origine models, provided they have compatible axles.

As the Graxx and Trail are lightweight bikes, however, you should take the total load being carried into account.
Only Direct Drive indoor trainers with an integrated cassette and roller models that do not block the wheel axles are permitted.

Models fitted with a clamp, a screw or which exert external pressure on the frame are prohibited.

Only road bikes and gravel bikes are compatible. Mountain bikes and e-bikes are not.

When using the trainer, avoid standing on the pedals and protect the frame from sweat splashes.
Support schemes may vary depending on your region.

We recommend that you check the applicable conditions with your local authority or the relevant public service.
In Europe, electric assistance is limited to 25 km/h.

The motor automatically cuts off assistance when you exceed 25 km/h. You can continue to pedal and ride at a higher speed, but without electric assistance.
Outlet bikes are brand-new bikes, sourced mainly from customer returns or clearance stock.
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In doubt, a question?
Contact us :
+33 (0)3 27 88 10 10
Monday to Friday :
9h-18h30
Saturday :
9h-16h30
Book an online (videoconference) appointment with an Origine technical adviser
Friday 09 October
Monday 12 October
Tuesday 13 October
Wednesday 14 October
Thursday 15 October
Display the following dates

Théorème FS TACT Edition B1

8 590 € | 11.2 kg
Theorem FS Team Edition B1

Configure and customise your bike.

Our proprietary configurator gives you the possibility to define for yourself the equipment and the deco of your bike, without any additional cost.

It's very simple, each time you change the drivetrain, wheelset and components, as per your liking, the photo, technical data sheet, bike weight and price are automatically updated. Make your dream bike lighter, more comfortable, choose the gearing options that will allow you to conquer any pass, paint it fluorescent green, or fluorescent whatever…

Let your personality and your criteria speak for themselves, you can't go wrong: our configurator will not allow you to associate components that are incompatible with each other and/or the frame. And if you are still unsure, just call us on +33 (0)3 27 88 10 10 to discuss your build with one of our technical or sales advisers.


Photo gallery

Théorème FS TACT Edition B1
Théorème FS TACT Edition B1
Théorème FS TACT Edition B1
Théorème FS TACT Edition B1
Théorème FS TACT Edition B1

Technological benefits

Théorème FS 120

Théorème FS 120

For riders seeking adrenaline, we've prepared a sensation-packed machine with the 120mm version. Explosive, agile, and playful, it's the bike redefining the basics of downcountry. Reduce the SAG, close the compressions, and it turns back into a World Cup contender.
Dynamic Linkage

Dynamic Linkage

When developing the Théorème FS, we made suspension performance our number one criterion.
We considered all the parameters and effects of full-suspension to reach our final choice. We required a system that was light, and highly efficient in tough technical sections, and that gave the sharpest handling. The solution was evident:
A Flex Pivot system, in other words, a deformable parallelogram, where the rear pivot point is provided by the deformation of the seat stays. Following on from Dynamic Response on our road bikes, discover Dynamic Linkage on our mountain bikes.
Integration

Integration

We’ve gone for maximum integration. If integration is more associated with road bikes, we wanted to better protect all the cables by placing them inside the frame. We wanted to eliminate as much as possible all the white noise when riding. Riding the Théorème FS, you will only hear your breathing and the tyres crunching along the trail.
Integrated steering lock

Integrated steering lock

Why limit ourselves to integration when we can develop an entirely new headtube?
A revolutionary head tube. Why limit ourselves to integration when we can develop a completely new head tube? Thanks to an integrated lock developed by our engineers, we've limited the head tube angle to 72°.

Full UDH compatibility

Full UDH compatibility

From the very beginning of the development of the Théorème FS, we designed it to adapt to the latest standards.
The UDH universal derailleur hanger, lets you inexpensively protect your frame. This format is also compatible with direct-mount derailleurs, with no hanger. With the new Théorème FS you can access all the new standards in MTB bikes.
Tech specs

Tech specs

Tapered headset: IS42/28.6 - IS52/40
Bottom bracket: PF92
Seat post: 30.9
Max tyre width: 29x2.40"
Frame material: Ultra High modulus carbon
Brakes max: Post Mount disc brakes 180 rear (180)
Thru-axles (rear): 12x148 mm Boost
Chainrings(max): 34
Number of bottle cages: 1
Front fork travel: 120mm
Front fork offset: 44mm
Rear shocks axle width: 165mm
Rear shocks travel: 40mm
Derailleur hangar: UDH compatible Transmission T-type
Géométrie

Geometries

S M L XL
ST Seat Tube length 410 440 470 500
TT Horizontal length 575 599 628 656
HT Head tube length 90 90 105 120
HR Fork steerer standard length 155 155 170 185
HR Fork steerer length range From 145 to 180 From 145 to 180 From 160 to 195 From 175 to 210
SA Seat tube angle 75.3 75.3 75.3 75.3
AH head tube angle 66.9 66.9 66.9 66.9
CS Chain stays length 435 435 435 435
SK Stack 594 594 608 622
RE Reach 418 444 467 494
BB BB Drop 38 38 38 38
LE Wheels base 1137 1162 1193 1223
RF Fork rake 44 44 44 44
Stem Mountain Trail WCS TFS
Cyclist size From 153 to 163 From 164 to 168 From 169 to 172 From 173 to 177 From 178 to 182 From 183 to 187 From 188 to 194 From 195 to 200
Stem Length 35 45 45 45 45 60 60 80
Handlebar width 740 740 740 740

Customer reviews

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Shipment in 4 weeks
Satisfait ou remboursé
BackSatisfied or refunded
Garantie
Lifetime guarantee
Price :
8 590 €
Pay in up to 3 interest-free instalments
Weight :
11.15 kg
(Size S)
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Configurateur vélo