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Brother Stroma Frameset
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The Stroma is the new Brother Cycles Reynolds 725 steel all-season road frame – a versatile, year round road bike suited to the ever changing weather and road surfaces of the UK. The bike is fast, responsive and most importantly fun to ride and we've designed it to accommodate large volume road tyres meaning you won't need a different bike for every season.
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.
The Stroma is 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. We've matched this with the Brother full carbon road fork up front giving 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.
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 (included)
Seat post diameter: 27.2mm
Seat clamp diameter: 30mm (included)
Headset: 44mm, ZS44/28.6 upper, EC44/40 lower (not included)
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 (included)
2 sets bottle cage mounts on all sizes
Rear rack and mudguard mounts
Di2 cable ports
Chainring clearance: up to 53-39t double, 50t single
Frame weight (medium): 1.97kg
Fork weight (uncut steerer): 0.50kg