• Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming
  • Genesis Croix de Fer 931 Frameset Reynolds 931 – Stainless Gravel Frame | Bikejamming

GENESIS Croix de Fer 931 Frameset – Reynolds 931 stainless steel

€2,798.00
Tax included

Reynolds 931 stainless steel frameset with carbon fork, T47 bottom bracket and thru-axles. A premium gravel platform for custom builds focused on durability, intensive use and a more responsive ride feel.

 

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Positioning and use logic

The Croix de Fer 931 frameset represents the highest level of the Croix de Fer platform in terms of material and construction.

It is designed for advanced gravel builds, where the frame is not just a structure but an active part of the bike’s dynamic behaviour.

Compared with Reynolds 725 steel:

  • Greater stiffness
  • More immediate response
  • Superior corrosion resistance

It remains a versatile platform, but with a clearly more performance-oriented setup.

Material: Reynolds 931 (what really changes)

Reynolds 931 is a cold-worked stainless steel.

In practical terms, this means:

  • Greater stiffness at the same weight
  • Higher long-term durability
  • No need for anti-corrosion treatments

It is not “more comfortable” than 725:

  • It is more reactive
  • More direct under load
  • More stable under acceleration

It is a material that makes sense when the frame becomes an active part of the ride, not just a support structure.

Frame and platform

The project introduces distinctive features:

  • Tapered head tube → greater front-end stiffness
  • Carbon fork → lower weight + more precise handling
  • T47 bottom bracket → larger contact surface and wider compatibility

The result is a more modern platform than the 725, while still retaining Croix de Fer geometry:

  • 12x100 / 12x142 mm thru-axles
  • Tyre compatibility up to 47 mm

Build and compatibility

The frameset includes:

  • EC34 / EC44 headset
  • Seat clamp
  • Thru-axles

T47 bottom bracket:

  • Stiffer than BSA
  • Broad compatibility with modern groupsets

Compatibility:

  • 1x and 2x drivetrains
  • Dropper post
  • Modular internal cable routing

Wheels and tyres

Compatible with 700c wheels.

Tyre clearance up to 47 mm:

  • Full gravel setup
  • Or faster-rolling configurations (38–40 mm)

The platform allows marked changes in behaviour depending on the setup.

When it makes sense

  • For high-end builds on a steel platform.
  • For riders wanting a more reactive frame than the 725.
  • For intensive use, including over long distances.

When it does NOT make sense

  • It is not necessary for occasional use or basic commuting.
  • It is not the easiest or most forgiving choice in the range.
  • It is not designed for riders prioritising comfort over response.

Size guide

  • XS: 156–164 cm
  • S: 164–172 cm
  • M: 172–180 cm
  • L: 178–186 cm
  • XL: 186–194 cm

These height indications are a general guide based on stature. We can support you in reading the geometry and configuring the frameset: info@bikejamming.it.

For sizing advice: height + inseam → reply within 24 hours.

Genesis Croix de Fer 931 Frameset FAQ

Is it lighter than the 725?

Not necessarily in any significant way. The advantage lies in response and durability, not in pure weight.

Is it more comfortable than the 725?

No. It is generally stiffer and more direct.

Does it make sense for bikepacking?

Yes, but it is more oriented toward active riding than the 725, which remains the more neutral platform.

Technical specifications

Frame Reynolds 931 Stainless Steel
Fork Amplitude G200 Carbon, tapered
Headset EC34 / EC44
Bottom bracket T47
Seatpost 27.2 mm
Seat clamp Included
Axles 12x100 mm front / 12x142 mm rear
Compatibility Flat-mount brakes, 1x / 2x drivetrains, dropper post
Tyre clearance Up to 47 mm

Geometry

Parameter XS S M L XL
Seat Tube 470 490 530 560 590
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
Wheelbase 1041.5 1046.4 1042.9 1059.4 1075.9

  • Brand
  • Reference
    GN11310XS
  • MPN
    VARGN11310

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