The 2025 Stroma from Brother Cycles in the UK is available for pre-order as of this morning, and it features a couple of fresh paint schemes, clearance for 38mm tires, internal dynamo routing on the matching carbon fork, and more. Find all the details and photos of a custom race-ready build here…

Photos by Ollie Harrop

Brother Cycles just announced the updated 2025 Stroma, their all-road platform designed to excel in year-round riding around their home turf in the UK, where the weather changes quickly, and you’ll find all manner of surface conditions. Earning its name from a remote, wind-battered island off the northeast coast of Scotland, the Brother Stroma is made in Taiwan from Reynolds 725 steel tubing and comes with a matching full-carbon Brother fork. New for 2025, the fork has been updated to feature internal dynamo cable routing. The frame and fork feature fender eyelets and will clear 32mm tires with fenders or 38mm tires without. Other specs include thru-axle flat-mount dropouts, a 68mm threaded BB, replaceable dropouts, a pair of bottle mounts in the main triangle, fender mounts, and Di2 routing that doubles as rear dynamo routing.

Brother Stroma, Brother Cycles Stroma
  • Brother Stroma, Brother Cycles Stroma
  • Brother Stroma, Brother Cycles Stroma

The complete build here showcases a race-ready configuration for riders who want to go fast and light throughout long days on the bike. Introducing this year’s updated model, Brother Cycles co-founder Will Meyer wrote, “We are particularly excited about the launch of the 2025 Stroma, as it’s a product which has been building a strong following over the past few years. When we initially designed this frame, we saw it as a true all-season road bike. However, since its launch, we’ve seen it being used for a whole lot more, from endurance bikepacking events to light gravel riding. As such, we wanted to show it some love in 2025 by making some subtle changes and giving it a bold new look.”

  • Brother Stroma, Brother Cycles Stroma
  • Brother Stroma, Brother Cycles Stroma
This year’s colors, Electric Blue and Rubble

2025 Brother Stroma Geometry

Size XS Small Medium Large XL
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 550mm 563mm 585mm 604mm
Reach 369mm 377mm 385mm 393mm 402mm
Wheelbase 990mm 995mm 1002mm 1017mm 1032mm
Brother Stroma, Brother Cycles Stroma
  • Brother Stroma, Brother Cycles Stroma
  • Brother Stroma, Brother Cycles Stroma

The updated Stroma is available in five sizes, as shown in the geometry chart above, and a frameset costs £1,199 ($1,500), including UK VAT. Frames are expected to arrive in late December 2024. You can find more details and order a Stroma over at BrotherCycles.com.

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