Brother Cycles Big Bro frameset metalic green

Delivery weight: 10 kg

Size:

Description

The Big Bro frameset with Rohloff Speedhub is a dream combination for bikepacking and long-distance travelling - robust, versatile and absolutely reliable.

Ideal for bikepacking adventures and long-distance travelling, perfect for Tour Divide, Silk Road Mountain Race and other expeditions

Works reliably with hub dynamo and USB chargers for mobile phones & GPS.

Sizes : S,M,L,XL / M - is ready

Colour : swamp think (metallic green)

The Brother Cycles Big Bro frameset is a versatile adventure frame made of robust 4130 chromoly steel, ideal for bikepacking, world travel and off-road tours. It offers space for wide tyres (up to 27.5″ x 3.0″ or 29″ x 2.6″), numerous mounting points for luggage racks and bottle cages as well as a sturdy steel fork with Boost thru-axles.

Specification :

Frame & fork

- Material: 4130 heat-treated chromoly steel, double butted, ED-coated (corrosion-resistant)

- Fork: 4130 chromoly, tapered unicrown, 15x110 mm thru axle (included)

- Weight: frame (size M/18″) approx. 2.6 kg; fork approx. 1.25-1.37 kg

⚙️ Technical data

- Brake mount: 51 mm IS disc mount, max. rotor size 180 mm

- Dropouts: Boost 12x148 mm thru axle (included), compatible with singlespeed or gears

- Derailleur hanger: SRAM UDH type, fully mountable

- Seatpost: Ø 30.9 mm

- Seat clamp: Ø 33.1 mm (included)

- Headset: 44 mm, SHIS ZS44/28.6 top, EC44/40 bottom (not included)

- Front derailleur mount: Ø 34.9 mm, top-pull or high direct mount (adapter available separately)

- Bottom bracket: 73 mm ISO thread

- Tyre clearance: up to 29″ x 2.6″ or 27.5″ x 3.0″

range of application

- Perfect for bikepacking adventures, long tours and demanding trails

- Numerous mounting points for bottle cages, pannier racks and bags

- Compatible with dropper post (stealth routing)

- Proven in long-distance races such as the Tour Divide (4,418 km) or the Silk Road Mountain Race (1,710 km)

Exactly...

the Brother Cycles Big Bro frameset is actually perfectly compatible with a Rohloff hub.

🔧 Why does the combination work so well?

- Boost dropouts (12x148 mm) with thru axle → stable and precise, ideal for the Rohloff Speedhub.

- IS disc mount → enables the Rohloff disc brake version to be fitted without any problems.

- Steel frame (4130 Chromoly) → extremely resilient, can withstand the high torques of the Rohloff without any problems.

- Mounting points → facilitate the attachment of cable guides and accessories.

- Singlespeed or gear compatible → the Big Bro is designed so that gear hubs such as the Rohloff can also be neatly integrated.

🚵 Advantages for touring cyclists

- Low maintenance: Rohloff + steel frame = virtually indestructible combination for travelling the world.

- Reliable: constant gear ratio, whether on Alpine passes or desert tracks.

- Flexible: with a hub dynamo, USB hub and lighting system, you have a complete, self-sufficient touring bike.

👉 In short: The Big Bro frameset with Rohloff Speedhub is a dream combination for bikepacking and long-distance travelling - robust, versatile and absolutely reliable.