Brother Cycles Stroma Frameset

Availability & Ordering
We list all framesets currently available from Brother Cycles as “in stock.” While we have a few on hand, most orders will be fulfilled via special order with approximately 14-day delivery.

To confirm ETA or any other questions, get in touch:
shop@bicyclejunction.co.nz | 04 385 2362

Brother Cycles Stroma Frameset – Endurance Ready, Weather Proof

Fast, comfortable, and ready for any road—rain or shine.

The Stroma is Brother’s ultimate all-road endurance frameset. Built for long-distance speed and comfort across changing road surfaces and unpredictable weather, it’s the perfect do-it-all road bike for year-round riders. Whether you call it an endurance bike, fast gravel, or all-road machine, the Stroma is designed to go the distance—smooth, responsive, and capable no matter how rough it gets.

Named after the remote and rugged island of Stroma off Scotland’s northeast coast, this frameset is built to handle brutal conditions with grace.

Constructed from Reynolds 725 steel for strength, durability, and all-day ride quality, it’s matched with Brother’s full carbon monocoque fork for precise steering and power transfer. The 2025 model now features internal dynamo routing, full mudguard and rack mounts, Di2 compatibility, and clearance for up to 700x38c tyres (or 32c with guards).

Key Features

• Frame: Reynolds 725 heat-treated, ED coated

• Fork: Carbon monocoque with tapered steerer, mudguard mounts, and dynamo routing

• Tyre Clearance: 700x38c (32c with mudguards)

• Mounts:

  • Rear rack + full mudguards

  • 2 x bottle cages

  • Di2 cable ports (dual use for rear dynamo)

• Brake Mounts: Flat mount, 160mm max rotor

• Axles: 12x142mm rear / 12x100mm front (thru-axles included)

• Bottom Bracket: 68mm ISO threaded

• Headset: 44mm (ZS44/EC44, not included)

• Seatpost: 27.2mm | Clamp: 30mm (included)

• Front Derailleur Clamp: 28.6mm

• Chainring Clearance: Up to 53-39t double or 50t single

• Frame Weight (Medium): 1.97kg

• Fork Weight (Uncut): 0.50kg

From wind-lashed tarmac to long summer loops, the Stroma is your fast and faithful companion for any road, any weather, any time of year.