Brother Cycles Stroma Frame Set

The Brother Cycles Stroma is a modern, all-season all-road and endurance bike made from high-quality Reynolds steel. With its carbon fork, generous tyre clearance and a full range of everyday mounts, it is the ideal choice for fast road rides, rough tarmac, commuting and long distances.

Size and colour: XS, S, M, L, XL

Electric Blue

Technical Specifications & Features

• Frame material:
  • Reynolds 725 heat-treated chromoly, double-butted
  • Rear triangle made from Reynolds 520/500, specially shaped
  • ED coating for optimum rust protection
• Brakes:
  • Flat Mount disc
  • Max. 160 mm rotor size
• Axles & dropouts:
  • Rear: 12×142 mm thru-axle (included)
  • Replaceable dropout inserts
• Seatpost & clamp:
  • Seatpost: 27.2 mm
  • Seatpost clamp: 30 mm (included)
• Headset:
  • 44 mm standard
  • ZS44/28.6 top
  • EC44/40 bottom
  • (Headset not included)
• Bottom bracket:
  • 68 mm BSA/ISO thread
• Tyre clearance:
  • Up to 700C × 38 mm
  • Up to 32 mm with mudguards
• Fork:
  • Full-carbon monocoque
  • Tapered 1.5" – 1 1/8"
  • 12×100 mm thru-axle (included)
  • Mudguard eyelets
  • Internal dynamo cable routing
• Mounting points:
  • 2 bottle cages
  • Rear luggage rack
  • Mudguard mounts
• Electronics:
  • Di2 ports (can also be used for internal dynamo lighting)
• Chainring compatibility:
  • Double: up to 53–39T
  • Single: up to 50T
• Weights:
  • Frame (M): 1.97 kg
  • Fork (uncut): 0.50 kg

The Brother Cycles Stroma combines the robustness of Reynolds steel with the precision of a carbon fork. With flat-mount disc brakes, thru-axles, generous tyre clearance and full mounting points, it’s perfect for all-road, endurance, commuting and winter training. Ideal for riders looking for a fast, comfortable and reliable all-season bike.

Custom bike build
If you’d like a complete bike build, we can customise the bike entirely to your specifications.
You choose the components, style and budget – we’ll advise you, create a suitable configuration and professionally assemble the bike in our workshop.

Simply let us know:

• what you intend to use the bike for,
• which parts you’d like to use (new or existing components),
• your budget.

We’ll draw up a full quote for you, including a detailed price breakdown.