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Théorème GR Ultra

Théorème GR Ultra

Off-road adventure


The off-road bike for adventure

Taking the notion of versatility to the extreme and built using our GTO carbon fibre layup for unbeatable comfort and performance, the GR Ultra features a drop bar to convert a hardtail mountain bike experience into a machine for ultra-endurance, plus off-road cycling. The rider’s reduced drag posture allows them to change both hand and saddle positions for optimum comfort over long distances. The stiff fork guarantees predictable steering that’s perfect for adventure-seekers, it defies convention and expands the boundaries of what's possible.

Select your model

Théorème GR Ultra M1
Théorème GR Ultra M1
Frame
Origine
Théorème GR Ultra
Fork
Suntour
Raidon 32 100mm
Derailleurs
Shimano
GRX 820 1x12v
Crankset
Shimano
SLX M7100 single 32
Cassette
Shimano
SLX M7100 12s 10-45
Wheelset
Fulcrum
Red Zone 500
Seat post
Origine
Monobloc forgée alu 0 Offset 30,9 400mm
Handlebar
Ritchey
Road Ergomax Comp
Stem
Ritchey
Mountain Trail TFS
Prix : 2 757 € Poids : 10 906 g
Théorème GR Ultra M2
Théorème GR Ultra M2
Frame
Origine
Théorème GR Ultra
Fork
Origine
Rigid MTB
Derailleurs
Shimano
GRX 820 1x12v
Crankset
Shimano
SLX M7100 single 32
Cassette
Shimano
SLX M7100 12s 10-45
Wheelset
DT Swiss
X 1900 Spline
Seat post
Origine
Monobloc forgée alu 0 Offset 30,9 400mm
Handlebar
Ritchey
Road Ergomax Comp
Stem
Ritchey
Mountain Trail TFS
Prix : 2 936 € Poids : 9 523 g
Théorème GR Ultra M3
Théorème GR Ultra M3
Frame
Origine
Théorème GR Ultra
Fork
Origine
Rigid MTB
Derailleurs
Shimano
GRX 820 1x12v
Crankset
Shimano
SLX M7100 single 32
Cassette
Shimano
SLX M7100 12s 10-45
Wheelset
Prymahl
Polaris A25 R 29''
Seat post
Origine
Monobloc forgée alu 0 Offset 30,9 400mm
Handlebar
Ritchey
Road Ergomax Comp
Stem
Ritchey
Mountain Trail TFS
Prix : 2 968 € Poids : 9 320 g
Théorème GR Ultra M4
Théorème GR Ultra M4
Frame
Origine
Théorème GR Ultra
Fork
Origine
Rigid MTB
Derailleurs
Shimano
GRX 820 1x12v
Crankset
Shimano
XT M8100 single 32
Cassette
Shimano
XT M8100 12s 10-51
Wheelset
Prymahl
Polaris C25 R 29''
Seat post
Origine
Monobloc forgée alu 0 Offset 30,9 400mm
Handlebar
Ritchey
Road Ergomax Comp
Stem
Ritchey
Mountain Trail TFS
Prix : 3 495 € Poids : 9 008 g
Théorème GR Ultra M5
Théorème GR Ultra M5
Frame
Origine
Théorème GR Ultra
Fork
Rock Shox
Sid SL Ultimate Race Day 100mm
Derailleurs
Shimano
GRX 820 1x12v
Crankset
Shimano
XT M8100 single 32
Cassette
Shimano
XT M8100 12s 10-51
Wheelset
Prymahl
Polaris C25 R 29''
Seat post
Origine
Monobloc forgée alu 0 Offset 30,9 400mm
Handlebar
Ritchey
Road Beacon Comp
Stem
Ritchey
Mountain Trail TFS
Prix : 4 121 € Poids : 9 491 g

Photo gallery

Théorème GR Ultra
Théorème GR Ultra
Théorème GR Ultra
Théorème GR Ultra
Théorème GR Ultra

Technological benefits

Theoreme GR

Theoreme GR

Our Théorème GR is much more than just a bike, it's also a mindset, a tool that will let you define your own cycling style and type without restrictions and free of predefined cycling codes. This model erases the barrier between MTB cycling and gravel. It's because of its top-performing carbon fibre, its stiff fork and geometry axed on versatility that allows you, astride the Théorème GR to push the different cycling barriers further.
Dynamic Response

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.
Steering limiter

Steering limiter

We have featured our in-house designed steering range stop. To improve rider and equipment safety, the bar’s rotation is limited to a maximum 72° angle either side. This prevents the bar, in the event of a crash, from over-rotating which could damage the frame and hoses, or possibly injure the rider from contact with the bar ends.

It also means that we can apply the same technologies that have proven so successful on the Théorème FS, such as a entirely straight down tube from the bottom bracket to the head tube for added stiffness and precise, responsive steering.
UDH hangar compatible

UDH hangar compatible

First seen on our Théorème FS, we have retained compatibility with UDH derailleur hangers on our Théorème hardtail. The main advantage of UDH hangers is the ease with which they can be replaced either at home or on the road. They are also compatible with direct-mount derailleurs without the need for an adaptor.So you have access to the best technologies on the market.

Rigid (no damping) fork

Rigid (no damping) fork

Our Théorème GR Ultra is equipped with a carbon rigid (no damping) front fork. It had been designed to the same exacting R & D criteria as our carbon frames. After 18 months of development, the fork has achieved a perfect balance between comfort, response and rider safety. On the Théorème it gives the rider assured and predictable steering for both MTB and gravel riding. This fork pushes further back the boundaries between the different cycling disciplines. Decide your own cycling trajectory.
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: 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

Avis non disponible

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