Top-tier Croix de Fer platform with Reynolds 725 steel frame, Shimano GRX RX820 2×12 drivetrain and hydraulic brakes. Thru-axle setup and higher-end components make it suitable for long-distance riding, bikepacking and intensive mixed-terrain use.
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Recap
The flagship model in the Croix de Fer range, with a Reynolds 725 steel frame, newly designed Genesis Carbon fork, Shimano GRX RX820 2×12 drivetrain and hydraulic disc brakes.
It is the most complete configuration of the platform for riders who spend many hours on the bike, across tarmac and gravel, with a setup suited to distance, bikepacking and regular use. The updated model introduces increased tyre clearance, dynamo routing through the fork and availability in five sizes, from XS to XL.
Positioning and intended use
The Croix de Fer 50 represents the most complete interpretation of the Croix de Fer platform: a steel bike for mixed-surface routes, designed to maintain consistent performance across tarmac, dirt roads and regular gravel.
It makes sense for riders who spend long hours in the saddle and want a stable, reliable and well-equipped gravel bike, without moving into the logic of a pure specialist bike. It is a distance and bikepacking-oriented gravel bike, not a technical off-road bike and not a platform designed only for speed on tarmac.
Frame and platform
The frame is built from Reynolds 725 steel tubing, the material defining the highest level of the Croix de Fer family. The platform remains stable, predictable and suitable for real-world long-distance use.
The updated Genesis Carbon fork introduces greater tyre clearance and internal dynamo routing. The 410 mm axle-to-crown measurement, with a 50 mm offset, keeps the bike coherent with a distance-focused gravel and all-road platform.
The presence of 12×100 mm front and 12×142 mm rear thru-axles, rack and mudguard mounts, luggage compatibility and accessory mounts clearly defines the purpose of the bike: not a generic gravel bike, but a serious configurable mixed-distance platform.
Build and technical choices
The Shimano GRX RX820 2×12 drivetrain, with Shimano GRX RX610 46/30T chainset and Shimano HG710 11-36T cassette, is one of the key elements of the model. It offers gearing suitable for transfers, climbs, mixed routes and light to medium bikepacking.
The Shimano GRX BR-RX820 hydraulic braking system, with 160 mm front and rear rotors, is coherent with regular use, including luggage and variable conditions.
The Amplitude G-100 wheels, with 622×26 rims, Center Lock hubs and double butted spokes, work with Maxxis Rambler 700×45c tubeless ready tyres. It is a setup focused on comfort, traction and rolling efficiency across mixed surfaces.
Wheels and tyres / compatibility
The Croix de Fer 50 comes fitted with Maxxis Rambler 700×45c tubeless ready tyres on Amplitude G-100 tubeless compatible rims. Tubeless tape is already installed and tubeless valves are included.
The declared maximum tyre clearance is 47 mm. This margin confirms the bike’s intended use: long-distance gravel, mixed routes and fast bikepacking, not drop-bar MTB.
When it makes sense
For long rides on tarmac, dirt roads and regular gravel.
For sporty bikepacking with light or medium luggage.
For riders looking for a Croix de Fer with GRX 2×12, hydraulic brakes and a Reynolds 725 frame.
For riders wanting an evolved steel gravel bike that is stable and usable all year round.
When it does NOT make sense
It is not the right choice for technical off-road riding, trail use or significantly wider tyres.
It is not the right choice for riders using the bike almost exclusively on tarmac with maximum road performance as the priority.
It is not the most rational choice if you are simply looking for the first entry point into the Croix de Fer platform.
Size guide
XS: generally for shorter riders or those needing a compact reach.
S: approximately 164–172 cm.
M: approximately 172–180 cm.
L: approximately 178–186 cm.
XL: generally for taller riders or those needing more reach.
These indications are approximate. For sizing advice, send us your height and inseam: reply within 24 hours.
Yes. It is one of the most complete Croix de Fer builds for light to medium bikepacking: Reynolds 725 frame, carbon fork with additional mounts, GRX 2×12 and thru-axle standards make it suitable for long mixed-surface routes.
Is it a gravel bike or a touring bike?
It is a distance-oriented gravel bike with a strong focus on light touring and bikepacking. It does not replace a pure expedition bike, but it performs very well on long rides across tarmac, dirt roads and regular gravel.
What tyres does it come with, and what is the maximum clearance?
It comes with Maxxis Rambler 700×45c tubeless ready tyres. Declared maximum clearance is 47 mm.
Is the fork dynamo-ready?
Yes. The new Genesis Carbon fork includes dynamo routing, useful for long-distance and regular-use setups.
Is the GRX 2×12 drivetrain suitable for touring?
Yes. The 46/30T chainset combined with an 11-36T cassette offers versatile gearing for mixed routes, transfers and climbing with light to medium luggage.
Technical specifications
Frame
Genesis Reynolds 725, 142 mm OLD, 12 mm thru axle
Fork
Genesis Carbon, 1-1/8" straight steerer, 100 mm OLD, 12 mm thru axle
Headset
EC34 / EC34
Fork axle-to-crown
410 mm
Fork offset
50 mm
Drivetrain
Shimano GRX RX820, 2×12 speed
Shifters
Shimano GRX ST-RX820 2×12
Front derailleur
Shimano GRX FD-RX820
Rear derailleur
Shimano GRX RD-RX820 12 speed
Crankset
Shimano GRX FC-RX610, 46/30T
Crank length
170 mm XS–S, 172.5 mm M–L, 175 mm L–XL
Bottom bracket
Shimano BSA 68 mm
Chain
KMC X12
Cassette
Shimano HG710 11-36T
Brakes
Shimano GRX BR-RX820 hydraulic
Rotors
160 mm front / 160 mm rear
Rims
Amplitude G-100, 622×26, 32H
Hubs
KT T20 / RR615, 32H, Center Lock
Spokes
Double Butted 14G Stainless
Tyres
Maxxis Rambler 700×45c TR
Handlebar
Amplitude G-100: 420 mm XS, 440 mm S–M, 460 mm L–XL
Stem
Amplitude G-100: 70 mm XS, 80 mm S, 100 mm M–XL
Bar tape
Black Gel Tape
Seatpost
Amplitude G-100, 27.2 mm × 350 mm
Seat clamp
Alloy, 29.8 mm
Saddle
Madison Flux Switch, 142 mm × 280 mm
Pedals
Not included
Claimed weight
11.5 kg
Colour
Bludacris
Warranty
Limited Lifetime Frame & Fork
Geometry
Parameter
XS
S
M
L
XL
Seat Tube
470
490
530
560
590
Effective Top Tube
553.2
557.2
558.2
573.8
589.4
Stack
551.6
565.8
584.7
603.6
622.5
Reach
395
395
385
395
405
Head Tube
100
115
135
155
175
Head Angle
71
71
71
71
71
Seat Angle
74
74
73.5
73.5
73.5
BB Drop
73
73
73
73
73
Fork Offset
50
50
50
50
50
Wheelbase
1041.5
1046.4
1042.9
1059.4
1075.9
Pre-order advice
Size, configuration and final choice depend on real-world use, body proportions and intended setup.
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