Brother Stroma

Highly Refined All-Season Road+ Bike

The undeniably classy Stroma is Brother’s latest Reynolds 725 steel all-season road frame – a versatile, year round road bike suited to the ever changing weather and road conditions of the UK. The bike is fast, responsive and most importantly fun to ride (just ask our staff…this is a one true staff favourite).  And it has been designed it to accommodate large volume road tyres; meaning you won’t need a different bike for every season or for every type of ‘road’ surface.

The Stroma truly lives up to its namesake; a remote island off the rough north east coast of Scotland, battered by ferocious weather and near impenetrable tides.  Constructed out of Reynolds 725 steel; a heat treated tubing famed for its strength and weight saving properties and an ideal material for the challenges posed by year round road cycling. It is then ED electrocoated to prevent rust both inside and outside the frame tubing. Matched with the Brother full carbon road fork up front gives you a lightweight and responsive front end with optimum power transfer. The frame and fork have fitted eyelets for full mudguards and clearance for up to 35mm tyres or 30mm with mudguards.

Other features include thru-axle flat-mount dropouts, replaceable dropout inserts, 2 x bottle cage and rear rack mounts, and Di2 routing. The frame is also compatible with ultra reliable British Standard bottom brackets, and has a deep hard-wearing powder coated finish, designed to cope with the worst of British weather.  All in all we believe you will be hard pressed to find a more beautifully designed, engineered and finished bike for taking on whatever type of ‘road’ you fancy…including those with nothing remotely resembling a properly paved surface!

Frame tubing: Reynolds 725 heat treated chromoly double-butted main triangle, ED coated. Reynolds 520/500 custom formed rear triangle.
Brake compatibility: flat mount, 160mm max rotor size
Rear Dropouts: 12x142mm TA
Seat post diameter: 27.2mm
Seat clamp diameter: 30mm
Headset: 44mm, ZS44/28.6 upper, EC44/40 lower
Front derailleur clamp diameter: 28.6mm
Bottom bracket shell: 68mm bottom bracket, ISO threaded
Maximum tyre clearance: up to 700c x 35mm (30mm with mudguards)
Fork: 1.5″ – 1.1/8″ tapered steerer carbon monocoque disc fork, mudguard mounts. 12x100mm TA
2 sets bottle cage mounts on all sizes
Rear rack and mudguard mounts
Di2 cable ports
Chainring clearance: up to 53-39t double
Frame weight (medium): 1.97kg
Fork weight (uncut steerer): 0.50kg

The Brother Stroma comes to us as a frameset in a beautifully subtle off white “cloud grey”, 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 Stroma can be tuned to suit any kind of road+ riding you like.

This is the kind of modern steel road bike that will be just as happy attacking summertime road rides, as it will churning wet base miles with full-coverage fenders and fat tires all winter long.BikeRumour


We are currently offering the Brother Stroma in the following standard specification. Stock shortages mean that we can’t offer a bare frameset as an option until further notice.

Brother Stroma 105 – £2,299

Sizes Small and Medium in stock now, other sizes due August


FRAMESET: Brother Stroma Reynolds 725 frame, full carbon fork, 100/142×12 thru-axles
SHIFT/BRAKE LEVERS: Shimano 105, 11-speed
FRONT BRAKE: Shimano 105 Hydraulic Disc, RT64 160mm rotors
REAR BRAKE: Shimano 105 Hydraulic Disc, RT64 160mm rotors
CRANKSET: Shimano 105 50/34T
CASSETTE: Shimano 105 11-30T
CHAIN: Shimano HG601 105, 11-speed
STEM: Deda Zero
SADDLE: Fabric Scoop Elite
WHEELS: Mavic Ksyrium S Disc (add £199 for Ksyrium SL Disc)
TYRES: Options include Continental Gatorskin, Schwalbe One Performance, Vittoria Rubino Pro G2 etc, subject to availability 
PEDALS: Not Included