BROTHER BIG BRO

Brother Big Bro

Tough as nails adventure & trail taming MTB

The classy Big Bro is Brother Cycles’ all purpose, tough as nails, 29er adventure bike – built to take you well off the beaten track and beyond. Whether you’re running a lightweight bike-packing setup, front and rear panniers for a ’round-the-world’ tour or stripped back to thrash some forest trails the Big Bro can handle it all.  The high quality steel frame and choice of full steel bike-packing fork or carbon trail fork, together with clearance for big volume tyres, deliver a ride quality that is simply outstanding and totally fuss free.

“every time I rode it, I returned feeling delighted by its handling and how much fun I’d had… Excuse the poetic license, but it’s a mountain bike that’s crying out to be ridden along grassy drover’s tracks in Mid Wales, or the historic, stony byways of England’s Lake District. It’s a Rough-Stuff Fellowship tourer, with a plus-sized twist. There are no airs or pretenses; aside, that is, from that lovely, eye-catching finish. It’s just a blast to ride.” Bikepacking.com

Like all Brother products the Big Bro has been rigorously tested out in the real world – prototypes were taken across the South Downs, through Snowdonia National Park and up to the Scottish Highlands. The Big Bro has since completed two of the worlds toughest bike-packing endurance races – the 4,418km Tour Divide from Canada to Mexico and the 1,710km Silk Road Mountain Race in Kyrgyzstan.

The frame is made out of tough 4130 double butted cro-mo tubing and comes with a 100mm suspension corrected fork, both with corrosion resistant ED coating applied inside and out. There’s clearance for big 29 x 2.6″ tyres or up to 3 inch tyres if you’d prefer to go 27.5+.

“I quickly fell in love with this bike.  It is refreshingly simple in design, stunning to look at and beautifully made.  It just seemed to call out ‘ride me’ every time I looked at it” Singletrack Magazine

The Big Bro features stealth dropper routing, rack mounts, bottle mounts on the seat tube, down tube and under the down tube for an extra bottle or storage. The forks also feature triple bottle mounts to fit further bottle cages or Anything Cages. S-bend chainstays with replaceable alloy thru axle sliding dropouts allow for geared or singlespeed setups (as seen below in one of our staff bikes).

The new Brother Carbon MTB fork has been developed as an upgrade for the Big Bro adventure frameset when luggage mounts aren’t a top priority – the full carbon fork is considerably lighter than a steel fork giving the bike’s front end a nimble and responsive feel – perfect for long distance gravel rides, trail riding and endurance events.

The Brother Bog Bro comes to us as a frameset, in the Forest Green colour below as well as one or two that we still have available in black, for building up into a complete bike in our workshop using components of your choice.  And with a huge variety of build options the Bro Bro can be built to support any kind of adventure you fancy.

Tubing: – 4130 Chromoly steel – double-butted main triangle, ED coated
Brake compatibility; 51mm IS disc brake mount, 180mm max rotor size
Dropouts: 12x142mm thru axle
Seat post diameter: 30.9mm
Seat clamp diameter: 33.1mm
Headset: 44mm, SHIS ZS44/28.6 upper, EC44/40 lower
Front derailleur clamp diameter: 34.9 mm high direct-mount (adapter available separately)
Bottom bracket shell: 73mm bottom bracket, ISO threaded
Maximum tyre clearance: 29″ x 2.6″, 27.5″ x 3.0″ (note: not all drivetrains allow for these maximum tyre clearances)
Fork : 4130 Chromoly tapered unicrown fork, ED coated. 15x100mm thru axle
Full-length cable housing guides for derailleurs and brakes
3 sets bottle cage mounts on all sizes
Chainring clearance: up to 48-36-26t triple, 42-28t double, 38t single
Weight: medium (18″) frame 2.60kg, fork (300mm steerer) 1.37kg
Tested to ISO 4210 MTB standard

Axle-to-crown:  482mm
Offset:  46mm
Steerer:  300mm, tapered 1 1/8 – 1 1/2″
Tyre Clearance:  29 x 2.35″ or 27.5 x 2.5″
Hub Spacing:  100mm
Post mount:  minimum 160mm rotor
Weight (uncut):  560g

BROTHER BIG BRO

The Brother Big Bro comes to us as a bare frameset initially, for building up into a complete bike with components of your choice. Below are some sample builds that we offer as standard Epic specifications, and can also use as a start point for custom quotations.

Brother Big Bro Deore 11s – £1,599

Specification

FRAME: Brother Big Bro 4130 Chromoly steel frame – double-butted main triangle, ED coated. 12x142mm thru axle
FORK: Brother Big Bro 4130 Chromoly tapered unicrown fork, ED coated. 15x100mm thru axle
HEADSET: M:Part
BOTTOM BRACKET: Shimano BB52
SHIFTER: Shimano M5100 Deore 11-speed
BRAKE LEVERS: Shimano M6100 Deore
FRONT BRAKE: Shimano M6100 Deore Hydraulic Disc, RT64 160mm rotors
REAR BRAKE: Shimano M6100 Deore Hydraulic Disc, RT64 160mm rotors
FRONT DERAILLEUR: n/a
REAR DERAILLEUR: Shimano M5100 Deore 11-speed, Shadow+, SGS long cage
CRANKSET: Shimano M5100 Deore 11-speed, 30T
CASSETTE: Shimano M5100 Deore 11-speed cassette, 11-51T
CHAIN: Shimano M7000 SLX, 11-speed
HANDLEBAR: Ritchey OE Rizer
GRIPS: ODI Attack
STEM: Ritchey OE 4-Axis
SEATPOST: Ritchey OE
SADDLE: Ritchey Streem
WHEELS: Mavic Crossmax
TYRES: Continental Cross King Shieldwall TR or similar, subject to availability
PEDALS: Not Included

Brother Big Bro Deore 12s – £1,899

Specification

FRAME: Brother Big Bro 4130 Chromoly steel frame – double-butted main triangle, ED coated. 12x142mm thru axle
FORK: Brother Big Bro 4130 Chromoly tapered unicrown fork, ED coated. 15x100mm thru axle
HEADSET: Hope
BOTTOM BRACKET: Shimano BB52
SHIFT/BRAKE LEVERS: Shimano M6100 Deore 12-speed
FRONT BRAKE: Shimano M6100 Deore Hydraulic Disc, RT64 160mm rotors
REAR BRAKE: Shimano M6100 Deore Hydraulic Disc, RT64 160mm rotors
FRONT DERAILLEUR: n/a
REAR DERAILLEUR: Shimano M6100 Deore 12-speed, Shadow+, SGS long cage
CRANKSET: Shimano M6100 Deore 12-speed, 30T
CASSETTE: Shimano M6100 Deore 12-speed cassette, 10-51T
CHAIN: Shimano M6100 Deore, 12-speed
HANDLEBAR: Ritchey Comp Rizer
GRIPS: ODI Attack
STEM: Ritchey Comp 4-Axis
SEATPOST: Ritchey Comp 2-Bolt
SADDLE: Fabric Scoop Sport
WHEELS: Hope 29ER Fortus 23W – Pro4
TYRES: Terravail Ehline Light & Supple 29″x2.5″ or similar, subject to availability
PEDALS: Not Included

Brother Big Bro XT – £2,449

Specification

FRAME: Brother Big Bro 4130 Chromoly steel frame – double-butted main triangle, ED coated. 12x142mm thru axle
FORK: Brother Big Bro 4130 Chromoly tapered unicrown fork, ED coated. 15x100mm thru axle
HEADSET: Hope
BOTTOM BRACKET: Shimano MT800
SHIFT/BRAKE LEVERS: Shimano M8100 XT 12-speed
FRONT BRAKE: Shimano M8100 XT Hydraulic Disc, RT86 160mm rotors
REAR BRAKE: Shimano M8100 XT Hydraulic Disc, RT86 160mm rotors
FRONT DERAILLEUR: n/a
REAR DERAILLEUR: Shimano M8100 XT 12-speed, Shadow+, SGS long cage
CRANKSET: Shimano M8100 XT, with Shimano CRM85 30T chainring
CASSETTE: Shimano M8100 12-speed cassette, 10-51T
CHAIN: Shimano M8100 XT, 12-speed
HANDLEBAR: Ritchey WCS Rizer
GRIPS: ODI Attack
STEM: Ritchey WCS
SEATPOST: Ritchey WCS 1-Bolt
SADDLE: Brooks Cambium All-Weather
WHEELS: Hope 29ER Fortus 23W – Pro4
TYRES: Terravail Ehline Light & Supple 29″x2.5″ or similar, subject to availability
PEDALS: Not Included

EPIC CYCLES

ESCAPE – EXPLORE – ADVENTURE