Brother Cycles Big Bro frameset black

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

Colour : Black

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)