BROTHER KEPLER
Highly Versatile bike-packing, touring or gravel bike
The Brother Kepler was designed from the outset with versatility and reliability in mind – depending on what kind of rides or adventures you have in mind it can adapt to pretty much anything with no compromises. So whether you are looking for a hardcore gravel bike, a super tough commuter, a bike-packing rig, or a bike for touring around the globe in the harshest of conditions, the Kepler is more than up to the task.
In the latest update Brother added some exciting new features to the Kepler, adding yet more versatility and class to their steel framed stalwart:
- New lugged steel fork with dynamo routing
- Internal cable routing for rear brake
- Brazed seat collar
- Bottle mounts under the down tube
- New Oak Leaf metal head badge
The Brother Kepler can run either 700c or 650b wheels, with clearance for anything up to 700c x 45 or 650b x 48 tyres. The frame is constructed from double butted 4130 chromoly steel, a super reliable tubing that provides the perfect balance of comfort and durability. Unlike many steel frame manufacturers, Brother have applied an ED coating under the paint to protect against corrosion.
It’s fully equipped to fit front and rear racks, mudguards and has three bottle mount positions (two in the main triangle, one under the down tube) if you’re loading up for a longer trip. To add to its bike-packing credentials the Kepler now features internal dynamo routing and triple cage mounts on its all-new lugged steel fork.
Tubing: 4130 Chromoly steel – double-butted main triangle, ED coated
Brake compatibility: flat mount, 160mm max rotor size
Rear Dropouts: 12x142mm TA (included)
Seat post diameter: 27.2mm
Headset: 1 1/8˝ threadless steerer/headset (not included)
Front derailleur clamp diameter: 28.6 mm
Chainring clearance: up to 52-39-30t triple, 50-34t double, 48t single
Bottom bracket shell: 68mm bottom bracket – ISO threaded
Tyre clearance: up to 700x45c or 650x48c
Fork: 4130 Chromoly lugged fork – 300mm steerer, 12x100mm TA (included)
Frame weight: 56cm = 2.25kg
Fork (with uncut steerer): 1.2kg
Tested to ISO 4210 standard
The Brother Kepler frameset is available for 2026 in a choice of two new colours – Green Metallic or Blue Metallic – which can then be built up into a complete bike in our workshop using components of your choice. And with a huge variety of build options the Kepler can be tuned to suit any kind of riding you like.
All in all, if you need a bike that’s as happy on the daily commute as it is on a weekend bike-packing trip, look no further than the Kepler.
BROTHER KEPLER
All our Brother Keplers start out as a bare frameset initially, for building up into a complete bike with suitable components of your choice. Below are sample custom builds that we can offer ‘off the peg’ or use as a start point for further customisation.
Kepler CUES 1x11s – £1929
For riding over a wide range of terrain in all conditions Shimano’s CUES 1x11s groupset offers the ultimate in robustness, versatility and longevity.
Specification
FRAMESET: Brother Kepler Disc 4130 Chromoly steel, ED coated 100/142×12 thru-axles
HEADSET: M:Part
BOTTOM BRACKET: Shimano RS500
SHIFT/BRAKE LEVERS: Shimano CUES U6030, 11-speed
BRAKES: Shimano CUES U6030 Hydraulic Disc, RT64 160mm rotors
FRONT DERAILLEUR: n/a
REAR DERAILLEUR: Shimano CUES U6000 CUES 11s rear derailleur, GS medium cage
CRANKSET: Shimano CUES U6000 40T or 42T
CASSETTE: Shimano CUES LG400 Link Glide, 11s, 11 – 50T
CHAIN: Shimano LG500 Link Glide HG-X
HANDLEBAR: PRO LT
STEM: PRO LT
SEATPOST: PRO LT
BAR TAPE: RaceRibbon Gel
SADDLE: Fabric Scoop Sport Radius
WHEELS: Oxford Evo Gravel Disc
TYRES: Pirelli Cinturato Allroad 700x40c
PEDALS: Half price pedals of your choice from leading brands, including Shimano, Look and Crank Brothers, available with every new bike order
ALTERNATIVE WHEEL OPTIONS INCLUDE:
- New DT Swiss G 1800 Spline – add £129
- Hope RX24 – add £359
Kepler 105 12s – £2029
If your riding is likely to be largely over paved or semi-paved surfaces Shimano’s 105 12 speed groupset is a slick and ultra reliable option.
Specification
FRAMESET: Brother Kepler Disc 4130 Chromoly steel, ED coated 100/142×12 thru-axles
HEADSET: M:Part
BOTTOM BRACKET: Shimano RS500
SHIFT/BRAKE LEVERS: Shimano 105, 12-speed
BRAKES: Shimano 105 Hydraulic Disc, RT64 160mm rotors
FRONT DERAILLEUR: Shimano 105 12s
REAR DERAILLEUR: Shimano 105 12s
CRANKSET: Shimano 105 50/34T
CASSETTE: Shimano 105 11-34T or 11-36T
CHAIN: Shimano 105, 12-speed
HANDLEBAR: PRO LT
STEM: PRO LT
SEATPOST: PRO LT
BAR TAPE: RaceRibbon Gel
SADDLE: Fabric Scoop Sport Radius
WHEELS: Oxford Evo Gravel Disc
TYRES: Pirelli Cinturato Allroad 700x40c
PEDALS: Half price pedals of your choice from leading brands, including Shimano, Look and Crank Brothers, available with every new bike order
ALTERNATIVE WHEEL OPTIONS INCLUDE:
- New DT Swiss G 1800 Spline – add £129
- Hope RX24 – add £359
Kepler GRX 600 12s – £2159
If you prefer to get off the beaten path, Shimano GRX has rapidly established itself as the industry standard for gravel riding.
Specification
FRAMESET: Brother Kepler Disc 4130 Chromoly steel, ED coated 100/142×12 thru-axles
HEADSET: M:Part
BOTTOM BRACKET: Shimano BB-RS500
SHIFT/BRAKE LEVERS: Shimano GRX RX610, 12-speed
BRAKES: Shimano RX400 Hydraulic Disc, RT64 160mm rotors
FRONT DERAILLEUR: Shimano RX820, 12-speed
REAR DERAILLEUR: Shimano RX820 12-speed
CRANKSET: Shimano RX610 46/30T
CASSETTE: Shimano HG710 11-36T 12-speed
CHAIN: Shimano M6100, 12-speed
HANDLEBAR: Ritchey Comp Butano
STEM: Ritchey Comp 4-Axis
SEATPOST: Ritchey Comp
BAR TAPE: Fabric Knurl Gravel 3.5mm
SADDLE: Fabric Scoop Sport Radius
WHEELS: Oxford Evo Gravel Disc
TYRES: Pirelli Cinturato Adventure 700x45c
PEDALS: Half price pedals of your choice from leading brands, including Shimano, Look and Crank Brothers, available with every new bike order
ALTERNATIVE WHEEL OPTIONS INCLUDE:
- New DT Swiss G 1800 Spline – add £129
- Hope RX24 – add £359