Théorème FS TACT Edition

TACT® technology—a world-exclusive innovation

In just 4 milliseconds, TACT® automatically adjusts the suspension to the terrain: locked to maximize performance, unlocked as soon as bumps appear, and fully released during descents.

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TACT Theorem, M1 Edition

6 198 € | 11.01 kg

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TACT Theorem, M2 Edition

7 645 € | 10.85 kg

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The FS TACT® Edition Theorem

20 units. Technology that has already proven itself at the highest level. An exceptional bike.

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Technological benefits

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

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

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

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

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

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

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

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Théorème FS TACT Edition

Select your model

The FS TACT® Edition Theorem

Photo gallery

Technological benefits

Théorème FS 120

Dynamic Linkage

Integration

Integrated steering lock

Full UDH compatibility

Tech specs

Geometries