Genesis Croix de Fer 725 – Reynolds 725 Frameset

The Genesis Croix de Fer 725 is a Reynolds 725 steel frameset with a Chromoly fork, designed for riders who want to choose their own drivetrain, wheels, cockpit and finishing kit.

Within the Croix de Fer range, the 725 offers a versatile starting point for gravel riding, mixed-surface touring and bikepacking. Established component standards and practical mounting points make it equally suitable for everyday use and longer journeys.

This frameset comes in the distinctive Massive Li-Lac colourway.

Reynolds 725 is a heat-treated chromoly steel. Its mechanical properties allow strong tubing with carefully selected wall thicknesses, retaining the construction characteristics associated with steel bicycle frames.

The Chromoly fork complements a platform built around versatility, custom component choice and long-term use.

Compared with the Croix de Fer 931, which uses Reynolds 931 stainless steel, a carbon fork and a T47 bottom bracket, the 725 takes a different approach: Reynolds 725 steel, a steel fork and a threaded BSA bottom bracket.

The choice is not simply about which material is more prestigious. For a touring build, the 725's established standards and broad component availability can be particularly useful when putting together a bike for a specific purpose.

The Croix de Fer 725 allows gearing and components to be selected around the terrain, distance and intended load .

Key features of the platform:

• Threaded BSA bottom bracket: a widely used standard with a broad choice of compatible parts.
• 12×100 mm front and 12×142 mm rear thru-axles: essential dimensions when choosing wheels.
• Flat Mount disc brake fittings: for compatible braking systems.
• Internal cable routing: for a tidy drivetrain installation.
• Dropper post compatibility: useful for builds that also tackle technical terrain.
• Rack, mudguard and bottle cage mounts: for touring and everyday practicality.
• Tyre clearance up to 47 mm: for gravel setups across a range of surfaces.

With a 71° head angle, 435 mm chainstays and 73 mm bottom bracket drop, the Croix de Fer geometry is intended to deliver predictable handling on mixed terrain.

The final ride characteristics also depend on wheel and tyre choice, gearing and riding position.

When buying a frameset, check the manufacturer's stated standards before ordering components.

The Croix de Fer 725 uses:

• EC34/EC34 headset.
• 1⅛-inch straight fork steerer.
• Threaded BSA bottom bracket shell.
• 27.2 mm seatpost.
• 29.8 mm seatpost clamp.
• Flat Mount disc brake fittings.
• 700c wheels with 12×100 / 12×142 mm thru-axles.
• 28.6 mm clamp-on front derailleur fitting.
• Maximum chainring size: 42T single or 48/31T double .
• Replaceable derailleur hanger, part number GNSPR40011 .

Genesis also specifies clearance for a 180 mm front brake rotor.

Important: sharing a frame standard does not automatically make every component using that standard compatible. Crankset, chainline, derailleurs, brakes and adapters must be checked as a complete system.

We can help assess your proposed build before you place an order.

According to Genesis, the frameset includes:

• Reynolds 725 steel frame.
• Amplitude G100 Chromoly fork.
• Headset.
• Seatpost clamp.
• Front thru-axle.
• Rear thru-axle.

Not included: bottom bracket, stem or seatpost. The stem and seatpost may appear in the manufacturer's photographs for illustration only.

This frameset is particularly suitable if you want to:

• Build a steel gravel bike with individually selected components.
• Set up a bike for journeys combining tarmac, unpaved roads and gravel tracks.
• Fit racks and mudguards for touring or commuting.
• Prioritise established component standards and long-term serviceability.

It is less suitable if your priority is an ultralight frame, a race-focused gravel platform or clearance for very wide mountain bike tyres.

These height ranges are a guide only. Inseam, body proportions, frame geometry and cockpit setup should also be considered when choosing a size.

For sizing advice, email info@bikejamming.it with your height, inseam and intended use.

Features

• Reynolds 725 tubing.
• Internal cable routing.
• Clearance for a 180 mm front brake rotor.
• Updated derailleur hanger design.
• Dropper post compatible.

Frame, fork and components

Additional information and compatibility

Manufacturer’s note: Images are for illustration only. Genesis reserves the right to change specifications, colour, features and pricing without notice.

Measurements in millimetres unless angles are shown in degrees.

Need help choosing the right frame size or planning your build?

We can help you assess frame geometry, component compatibility and setup options based on your intended use.

Email us with your height, inseam measurement and intended use. We reply within 24 hours.

info@bikejamming.it