What We Say… The Brother Stroma is very much our kind of road bike! With a brand new stunning design and wider clearance, we think it’s the perfect all road basher. If any of us ever dared to don some (stretchy) lycra, this would be the bike we would do it on! What They Say… The Stroma is a versatile, year-round road bike suited to the ever changing weather and road surfaces of the UK. It’s an all-road, fast gravel, endurance bike. However you want to classify it, the Stroma is an extremely capable machine – designed to be fast, responsive and supremely comfortable over distance, no matter how rough it gets. 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 frame 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 – this has also been updated for 2025 to now include internal dynamo routing – further enhancing the Stroma’s endurance credentials. The frame and fork have fitted eyelets for full mudguards and clearance for up to 38mm tyres or 32mm with mudguards. Other features include thru-axle flat-mount dropouts, replaceable dropout inserts, 2 x bottle cage and rear rack mounts, and Di2 routing – which neatly doubles up as internal routing for a rear dynamo light. 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 sizeRear Dropouts: 12x142mm TA (included)Seat post diameter: 27.2mmSeat clamp diameter: 30mm (included)Headset: 44mm, ZS44/28.6 upper, EC44/40 lower (not included)Front derailleur clamp diameter: 28.6mmBottom bracket shell: 68mm bottom bracket, ISO threadedMaximum tyre clearance: up to 700c x 38mm (32mm with mudguards)Fork: 1.5″ – 1.1/8″ tapered steerer carbon monocoque disc fork, mudguard mounts. 12x100mm TA (included), dynamo routing2 sets bottle cage mounts on all sizesRear rack and mudguard mountsDi2 cable portsChainring clearance: up to 53-39t double, 50t singleFrame weight (medium): 1.97kgFork weight (uncut steerer): 0.50kg Size xSmall Small Medium Large xLarge Seat Tube (C-T) 500mm 520mm 540mm 560mm 580mm Top Tube (C-C) 510mm 526mm 542mm 557mm 572mm Top Tube (Effective) 522mm 540mm 557mm 572mm 587mm Head Tube 110mm 125mm 140mm 160mm 180mm Head Angle 71 72 72.5 72.5 72.5 Seat Angle 74 73.5 73 73 73 BB Drop 70mm 70mm 70mm 70mm 70mm Chainstay 420mm 420mm 420mm 420mm 420mm Fork Length (A-C) 381mm 381mm 381mm 381mm 381mm Fork Rake 45mm 45mm 45mm 45mm 45mm Stack 532mm 550m 563mm 585mm 604mm Reach 369mm 377mm 385mm 393mm 402mm Wheelbase 990mm 995mm 1002mm 1017mm 1032mm
