Tough as nails, this 29er adventure bike is ready to take you off the beaten track. Get in touch about a custom build today!
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The Brother Cycles Big Bro is one of our favorite all arround Touring and bikepacking frames.

Sliding dropouts give you the option to vary chain stay lenght, run as single speed or with a Rohloff or IGH.

Lots of mounts for attacking racks and cargo and very generous tyre clearance.

It very nicely stradles the divide between a very capable touring bike and a mountain bike. 


New stock just arrived, Yellow and Woodland Brown. 



  • Tubing - 4130 Chromoly Steel - Double-butted main triangle, ED coated
  • Brake Compatibility: 51mm IS disc brake mount, 180mm max rotor size
  • Dropouts: Boost 12x148mm Thru axle included
  • Seatpost Diameter: 30.9mm
  • Seat clamp Diameter: 33.1mm (included)
  • Heaedset: 44mm, SHIS ZS44/28.6 upper, EC44/40 lower (not included)
  • Front derailleur clamp diameter: 34.9mm high direct-mount (adapter available separately)
  • Bottom Bracket Shell: 73mm, ISO threaded
  • Max tyre clearance: 29"x2.6" or 27.4"x3.0"
  • Fork: 4130 Chromoly tapered unicrown fork, ED coated, 15x110 Boost thru axle (included), 3 sets bottle cage mounts on all sides
  • Chainring clearance: 44-30t double, 38t single
  • Weight: medium is 2.6kg frame, 1.37kg fork


ST Length406457508559
TT Length556571595622
Top Tube Effective575595620645
Head Tube95100110125
Head Angle69.57070.570.5
Seat Angle73737373
BB Drop60606060
Min Chainstay445445445445
Fork Length483483483483
Fork Rake46464646