Théorème GTR 29″

High performance

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High-performance, lightweight cross-country mountain bike

The Théorème GTR is a hardtail bike for those who don't have a second to lose.

Designed for competition, its performance, its response and its predictable steering provided by the High Modulus carbon fibres make it the favourite weapon of XC MTB track fans.

Coupled with total integration, steering lock limiter developed by our engineers and UDH hangar compatibility, the only thing left for you to do is get on the podium.

Configurator

Select your model

Théorème GTR M5

Frameset

Origine

Théorème GTR

Fork

Rock Shox

Sid SL Ultimate Race Day 100mm Remote

Derailleurs

Sram

XX SL AXS T-Type

Crankset

Sram

XX SL Eagle T-Type 34 CL55

Cassette

Sram

XX Eagle 10-52 12 s

Wheelset

Prymahl

Polaris C30 Pro 29''

Seat post

Kind Shock

Rage-i Hydraulics

Handlebar

Origine

Mountain Flat Carbon 760

Stem

Controltech

SLA TFS

Prix : 7 314 € Poids : 9 111 g

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Configurator

Théorème GTR M4

Frameset

Origine

Théorème GTR

Fork

Rock Shox

Sid SL Ultimate Race Day 100mm Remote

Derailleurs

Shimano

XTR M9200 Di2 1x12v

Crankset

Shimano

XTR M9200 32

Cassette

Shimano

XTR M9200 12s 10-51

Wheelset

Mavic

Crossmax SL Ultimate 30

Seat post

Kind Shock

Rage-i Hydraulics

Handlebar

Origine

Mountain Flat Carbon 760

Stem

Controltech

SLA TFS

Prix : 7 066 € Poids : 9 466 g

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Configurator

Théorème GTR M3

Frameset

Origine

Théorème GTR

Fork

DT Swiss

F232 One 100mm Remote

Derailleurs

Shimano

XT M8100 12s

Crankset

Shimano

XT M8100 single 32

Cassette

Shimano

XT M8100 12s 10-51

Wheelset

Prymahl

Polaris C25 R

Seat post

Kind Shock

Rage-i Hydraulics

Handlebar

Origine

Mountain Flat Carbon 760

Stem

Controltech

SLA TFS

Prix : 4 102 € Poids : 9 792 g

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Configurator

Théorème GTR M2

Frameset

Origine

Théorème GTR

Fork

Suntour

Axon 34 Elite 120mm Remote

Derailleurs

Sram

GX Eagle AXS T-Type

Crankset

Sram

GX Eagle T-Type 32 CL55

Cassette

Sram

GX Eagle 10-52 12 s

Wheelset

Prymahl

Polaris A25 Pro

Seat post

Ritchey

Zero offset WCS 30.9 400mm

Handlebar

Origine

Mountain Flat Carbon 760

Stem

Controltech

SLA TFS

Prix : 4 203 € Poids : 9 485 g

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Configurator

Théorème GTR M1

Frameset

Origine

Théorème GTR

Fork

Suntour

Raidon 32 100mm

Derailleurs

Shimano

SLX M7100 1x12s

Crankset

Shimano

SLX M7100 single 32

Cassette

Shimano

SLX M7100 12s 10-51

Wheelset

Fulcrum

Red Zone 500

Seat post

Origine

Monobloc forged alu 0 Offset 30.9 400mm

Handlebar

Ritchey

MTN Rizer Comp 740

Stem

Controltech

SLA TFS

Prix : 2 607 € Poids : 10 800 g

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Configurator

Photo gallery

Technological benefits

Theoreme Hardtail

Discover the new Théorème hardtail, a concentrated powerhouse that highlights speed and performance. And as is always the case at Origine, these features are not at odds with comfort and accessibility - quite the contrary.

The technologies we have developed make our hardtail one of the lightest and best performing in the highly-competitive world of XC.

Dynamic Response

The Dynamic Response concept reflects Origine’s personality to obtain the very highest performance, while maintaining a certain level of comfort. The choice and lay up of carbon fibres have been designed to give priority to response over stiffness and to allow extremely rapid return after deformation.
Our engineers focused the bike’s build around the Dynamic Response concept. Rather than preventing the frame from deforming at various stress points (bottom bracket and the head tube when cornering) so as not to lose power transfer, the Théorème works more like a spring, an archer's bow for an extremely fast return following deformation.
As a result, it's more responsive, more predictable, even in series of fast, tight bends. It is also easier to steer and more comfortable on long rides, during those moments of tiredness or in winding, technical areas.

Integration

No more brake hoses banging against each other as you go over a scree, no more tree branches catching the bike and rider by the derailleur hoses. Where some might see this as an aesthetic advantage, we see integration as the solution to increasing the reliability and longevity of cables and hoses, well protected in the frame.

While developing this new platform, we also integrated the saddle clamp. Here too, this provides additional natural rigidity at the top tube/seat tube junction, reinforcing the frame's strength without any superfluous weight.

Steering lock

We used our in-house steering lock technology. To ensure safety for both rider and equipment, the steering has a maximum angle of rotation of 72° on each side. There's no chance of ripping the sheaths or hitting the handlebar end in the event of a fall.

This technology also eliminates the curvature at the top of the downtube, providing additional rigidity and even greater performance.

UDH compatibility

Theorem has been designed to meet today's standards. The UDH, the universal derailleur hanger, allows you to protect your frame, while being inexpensive and easy to find. This format is also compatible with direct-mount derailleurs, with no intermediate bracket. So you have access to the best the market has to offer.

GTO and GTR slips

One frame, two behaviors.

The GTO delivers the perfect mix of comfort, vibration absorption and performance. The result is an ultra-versatile MTB, from club outings to marathon XC and ultradistance. Whatever the discipline, GTO draping limits fatigue generation and allows you to push harder.

The GTR is uncompromising on performance. Light, responsive, everything you'd expect from a competition bike. But it wouldn't be an Origine if we hadn't gone to great lengths to keep it forgiving. So it remains accessible to all, and will push you to give your all in every situation.

Hand-painted in our workshops

Origine frames are painted in our workshops in northern France.

We have chosen to use only automotive-grade water-soluble paints.

Its resistance to impact and abrasion is far superior to that of frames painted in Asia, and its ecological impact is greatly reduced.

The Theorem is available as a single frame or as a complete bike.

It comes with a lifetime warranty and is fully customizable in the Configurator to match the tastes and expectations of all enthusiasts.

Tech specs

Tapered headset: IS42/28.6 - IS52/40
Bottom bracket: PF92
Seat post: 30.9
Max tyre width: 29x2.40"
Frame material: High modulus carbon
Brakes max: Post Mount disc brakes 160 rear (180)
Thru-axles (rear): 12x148 mm Boost
Chainrings(max): 36
Number of bottle cages: 2
Front fork travel: 100 or 120mm
Derailleur hangar: UDH

Geometries

		S		M		L		XL
ST	Seat Tube length	395		435		475		525
TT	Horizontal length	580		605		630		655
HT	Head tube length	90		100		115		130
HR	Fork steerer standard length	150		160		175		190
HR	Fork steerer length range	From 145 to 170		From 155 to 180		From 170 to 195		From 185 to 210
SA	Seat tube angle	74.3		74.3		74.2		74.2
AH	head tube angle	68.5		68.5		68.5		68.5
CS	Chain stays length	430		430		430		430
SK	Stack	598		608		622		636
RE	Reach	412		434		454		475
BB	BB Drop	60		60		60		60
LE	Wheels base	1097		1123		1148		1175
RF	Fork rake	44		44		44		44
Stem SLA 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

Customer reviews

Kit cadre Gravel Trail

⭐️⭐️⭐️⭐️⭐️ J’ai choisi le kit cadre Trail (taille L) en Viola Métallique et je ne regrette absolument pas 💜 ! Le cadre alu offre un équilibre idéal entre rigidité et confort, associé à la légèreté de la fourche carbone, le vélo est maniable, précis et agréable aussi bien pour le vélotaff que pour les sorties bikepacking bien chargées. Je redécouvre le plaisir de rouler à vélo, et c’est exactement ce que je recherchais. Merci Origine pour ce superbe vélo !

Théorème GT - Shimano XT - Fulcrum Red zone 500

Peut-être le premier origine à faire et finir la tour divide aux US

Thèorème GTR - SRAM XX1 Eagle AXS - Polaris C25 pro

VTT semi rigide GTR full carbon. Après 3 mois de sortie Super vélo ,sensation XXL, dérailleur SRAM XX1 Eagle AXS , roues Polaris C25 pro. Suite à un petit souci lors d'une sortie appel au SAV réactivité max . Je recommande. Denis

Théorème GT - Shimano XT - Prymahl Polaris A25 Pro

30 ans de VTT derrière moi, retour sur un semi-rigide... Des décathlons, un Zesty, un fuel EX et maintenant un Théorème GT. Mon premier carbone monoplateau. Un vrai jouet, très réactif, vif, léger, grisant ! Fourche de 120mm, tige de selle télescopique, ça passe vraiment partout et ça va vite ! Évidement ça bute sur du terrain dur et défoncé. Le manque d'un amortisseur centrale se fait sentir. Mais à plus de 50 ans, j'ai (re) trouvé une machine à sensation.

Théorème GTR - Sram 12v lunar - Prymahl Polaris A30 R

Le vtt est très agréable dans les descentes. Très réactif dans les relances. Equipé en Sram XX1 pour la transmission et avec des freins SHIMANO XTR, le vtt a un bon équipement technique. La possibilité de choisir soi-même ses composants est vraiment un plus : vtt à la carte. Je conseille fortement Origine.

Théoreme GT - Shimano SLX - Roues DT Swiss X 1900 Spline

Merci pour la tenue des délais et surtout de la qualité du vélo ! Arrivé samedi, première sortie dimanche, un vrai bonheur.

Théoreme GT - Shimano SLX - Roues Fulcrum Red Zone 500

Bonjour, mon théorème gt est bien arrivé en Bretagne et il répond déjà à toute mes attente. Merci à toutes l'équipe pour les conseils, le suivi et votre savoir-faire. Bonne continuation et merci encore 😉

What the press say