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Théorème GR

Théorème GR

MTB & gravel


The MTB that redefines the borders of cycling disciplines

Much more than just a hardtail mountain bike, the GR encapsulates a wholly new vision of off-road cycling, at the crossroads between mountain biking and gravel cycling. Made using the same fibre as on our GTO bikes, the result is great response, low weight and impressive damping. Internal routing is standard for cleaner lines. The flat bar and rigid fork provide predictable steering and control on all types of terrain. Explore new horizons, push your limits and redefine your riding.

Select your model

Théorème GR M1
Théorème GR M1
Frameset
Origine
Théorème GR
Fork
Origine
Rigid MTB
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
Ritchey
Mountain Trail TFS
Prix : 2 384 € Poids : 9 505 g
Théorème GR M2
Théorème GR M2
Frameset
Origine
Théorème GR
Fork
Origine
Rigid MTB
Derailleurs
Shimano
XT M8100 12s
Crankset
Shimano
SLX M7100 single 32
Cassette
Shimano
SLX M7100 12s 10-51
Wheelset
DT Swiss
X 1900 Spline
Seat post
Origine
Monobloc forged alu 0 Offset 30.9 400mm
Handlebar
Ritchey
MTN Rizer Comp 740
Stem
Ritchey
Mountain Trail TFS
Prix : 2 649 € Poids : 9 357 g
Théorème GR M3 AXS
Théorème GR M3 AXS
Frameset
Origine
Théorème GR
Fork
Origine
Rigid MTB
Derailleurs
Sram
GX Eagle AXS T-Type
Crankset
Sram
GX Eagle T-Type 32 CL55
Cassette
Sram
GX Eagle 10-52 12 s
Wheelset
DT Swiss
X 1900 Spline
Seat post
Origine
Monobloc forged alu 0 Offset 30.9 400mm
Handlebar
Ritchey
MTN Rizer Comp 740
Stem
Ritchey
Mountain Trail TFS
Prix : 3 522 € Poids : 9 328 g
Théorème GR M4
Théorème GR M4
Frameset
Origine
Théorème GR
Fork
Origine
Rigid MTB
Derailleurs
Sram
X01 Eagle 12s
Crankset
Sram
GX Eagle 32 single Dub
Cassette
Sram
GX Eagle 10-52 12 s
Wheelset
DT Swiss
X 1900 Spline
Seat post
Origine
Monobloc forged alu 0 Offset 30.9 400mm
Handlebar
Ritchey
MTN Rizer Comp 740
Stem
Ritchey
Mountain Trail TFS
Prix : 3 281 € Poids : 9 547 g
Théorème GR M5 AXS
Théorème GR M5 AXS
Frameset
Origine
Théorème GR
Fork
Origine
Rigid MTB
Derailleurs
Sram
XX SL AXS T-Type
Crankset
Sram
XX SL Eagle T-Type 34 CL55
Cassette
Sram
GX Eagle 10-52 12 s
Wheelset
Prymahl
Polaris C25 R
Seat post
Ritchey
Link Flexlogic Superlogic Carbon 400mm
Handlebar
Ritchey
MTN Rizer Comp 740
Stem
Ritchey
Mountain Trail TFS
Prix : 5 246 € Poids : 8 506 g

Technological benefits

Theoreme GR

Theoreme GR

The Théorème GR is much more than a bike. It's a state of mind. A tool that lets you design your own riding style, without constraints or predefined codes. This model breaks down the barriers between mountain biking and gravel.
Thanks to a high-end carbon fiber frame, a rigid fork and a geometry designed for versatility, the Théorème GR is cut out to push back the limits of all disciplines.
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 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

Customer reviews

What the press say

Théorème GR - Review and test by Gravel & Bike
Théorème GR - Review and test by Gravel & Bike
Par Gravel & Bike
Théorème GR - Tested during a bikepacking trip...
Théorème GR - Tested during a bikepacking trip...
Par Weelz
Axxome RR: Grinta presents this exceptional bike!
Axxome RR: Grinta presents this exceptional bike!
Par Grinta
Origine Racing Division, a sensational start
Origine Racing Division, a sensational start
Par Vélo Vert
Axxome GTO Ultra - Press test by Cyclist magazine
Axxome GTO Ultra - Press test by Cyclist magazine
Par Cyclist