Discover the Theoreme FS

LE XC / DOWNCOUNTRY IN ITS ULTIMATE VERSION Available in 100 or 120mm

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Théorème FS

Origine's DNA has been intimately linked to mountain biking ever since it was founded. Through the past of its founders, but also of the hundred or so people who work for Origine today. We couldn't wait any longer before opening the door to the world of mountain biking, which we had already opened a few years ago with the Théorème and the Naja.

Expected, imagined, and here it is. The Théorème, in its ultimate version. More versatile, more powerful, more aggressive, we present the Théorème Full Suspension.

Théorème FS 100

For racers in pursuit of victory, precision and performance. The 100mm travel version is for you. Lightweight and aggressive, this is the version that will help you set the fastest lap times, whether in a regional race or a world cup.

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Théorème FS 120

For adrenalin-seeking riders, we've designed a sensational machine with the 120mm version. Explosive, agile and playful, this is the bike that redefines the basics of downcountry. Reduce the SAG, increase the compression and it becomes a world cup machine.

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Dynamic Linkage

Effective kinematics

When developing the FS Theorem, we naturally made suspension performance the number one criterion.

We took into account all the parameters and influences of the suspension to arrive at the final choice. We needed a system that was light, efficient both when pedalling and in rough sections, and that provided incisive handling. The answer was clear:
A Flex Pivot system, in other words, a deformable parallelogram, where the rear pivot point is provided by the deformation of the seat stays. After Dynamic Response on our road bikes, discover Dynamic Linkage on our mountain bikes.

GTR / GTO

Two carbon layups, two philosophies

GTO, for maximum versatility, has a very forgiving layup, combining high modulus fibres with softer fibres that absorb vibrations and give you a very good feel for the terrain. You can ride for long hours without getting tired. Get on the train, enjoy the descent, and do it again. All day long.

GTR, for uncompromising performance and lightness. For those looking for maximum performance, instant responsiveness from the frame and the ability to chase the clock on any race, then the GTR version will offer the best experience. We've assembled the best existing fibres into an elaborate layup. You'll find the right level of stiffness, in the right place, without a single superfluous gram.

The internal routing

is no longer an option

We've decided to integrate the wiring as much as possible, even on mountain bikes. While this integration offers aerodynamic and aesthetic benefits on a road bike, it also protects all the cables and hoses on a mountain bike, and eliminates unwanted noise when riding.
With the Théorème FS, the only sound you'll hear is the rolling of the tyres.

Steering lock

A new kind of headset

Thanks to an integrated steering lock developed by our engineers, we have limited the steering angle to 72°. This gives us a number of advantages:
• No stress or damage to the wiring in the event of a fall
• No bending of the down tube, giving greater rigidity at the head tube.
• A polymer bumper cushions the end of rotation and prevents the headset from breaking or bouncing back.

Compatibility with modern standards

UDH (Universal Derailleur Hanger)

Right from the start, when we developed the Théorème FS, we designed it to adapt to the latest standards.
Our frame is therefore compatible with the UDH standard, and consequently with direct-mount derailleurs.
The Boost standard has of course been retained for the rear triangle, and the maximum tyre diameter of 2.40 means we can take full advantage of the growing downcountry offer.

Imagining the possibilities

Custom.

Customise your Théorème online, according to your riding style, your desires, your budget and your body type. The Origine configurator offers millions of configurations for a unique bike that reflects who you are. Configure now, a Theoreme FS as unique as you are

Geometry

Théorème FS 100

Théorème FS 120

Geometries

		S		M		L		XL
ST	Seat Tube length	410		440		470		500
TT	Horizontal length	572		597		626		654
HT	Head tube length	90		90		105		120
HR	Fork steerer standard length	150		150		165		180
HR	Fork steerer length range	From 145 to 170		From 145 to 170		From 160 to 185		From 175 to 200
SA	Seat tube angle	76.2		76.2		76.2		76.2
AH	head tube angle	67.8		67.8		67.8		67.8
CS	Chain stays length	435		435		435		435
SK	Stack	587		587		600		614
RE	Reach	428		453		478		503
BB	BB Drop	45		45		45		45
LE	Wheels base	1128		1154		1185		1216
RF	Fork rake	44		44		44		44
Stem CLS 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
Crank length		170	170	170	175	175	175	175	175

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	150		150		165		180
HR	Fork steerer length range	From 145 to 170		From 145 to 170		From 160 to 185		From 175 to 200
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 CLS 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
Crank length		170	170	170	175	175	175	175	175

Technical information

Technical specifications

Suspension	Dynamic Linkage (flex pivot)
Headset	Integrated IS52/52 with steering lock
Seatpost	30.9mm
Shock absorber center distance	165mm
Shock absorber stroke	40mm (100mm) – 45mm (120mm)
Fork	100mm – 120mm
Fork offset	44mm
Brake caliper mount	PM 180mm
Bottom bracket	PressFit 92mm
Max. tire size	29" x 2.40
Max. chainring size	34
Water-bottle holder	1
Derailleur hanger	Sram UDH - T-Type transmission compatible

Ratio

Anti-Squat

Anti-Rise

Dynamic Linkage kinematics, combined with custom shock absorber settings, combine the best of both worlds:
- Extreme sensitivity to small impacts
- Higher progressivity at the end of the stroke, ensuring good support and no heel-toeing on the biggest shocks, so you can always keep control of the bike, even in the most demanding situations.

With an anti-squat of 103% at SAG, you can be sure that your suspension will always be responsive. What's more, even at the end of the travel range it remains above 90%. As a result, even on the most technical and roughest climbs, your suspension will continue to do its job with maximum efficiency.

The anti-creep feature is no less impressive. With around 90% SAG and up to 75% at the end of the shock absorber stroke, the suspension remains active whatever the situation, keeping the wheel in contact with the ground even during hard braking.

Select your Theoreme FS

Théorème FS 100 GTR

100mm GTR

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Théorème FS 120 GTR

120mm GTR

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Théorème FS 100 GTO

100mm GTO

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Théorème FS 120 GTO

120mm GTO

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