Brother Cycles Stroma Frameset (2025)
Brother Cycles Stroma Frameset (2025)
- 4.9 from 782 Google reviews
- Independent Bike Dealer of the Year 2025, BikeBiz Awards
- UK delivery from £4.99, or free collection from our Bow shop at E3 3XS.
- Checked by our team before it leaves us
Collecting instead? Email us or message us on WhatsApp before you visit, so we can have it ready for you.
The 2025 Stroma in Electric Blue and Rubble: the same Reynolds 725 all-road frame, in last season's colours and limited sizes.
The Stroma is Brother's year-round road bike, designed for the changing weather and broken surfaces of British roads. It is fast and responsive, but with room for 38mm tyres, it stays comfortable when the lanes get rough.
This is the 2025 model, with the carbon road fork that gained internal dynamo routing that year. Geometry and spec match the current Stroma, so if your size is still available in one of these two colours, it is the same bike in a different paint job. Stock is limited to the remaining sizes.
Why we chose this for our customers:
- Built for UK roads: fast and responsive, but with room for 38mm tyres when the lanes are broken up
- Year-round ready: full mudguard eyelets front and rear, still clears 32mm tyres with guards fitted
- Light for steel: under 2kg for a medium frame, paired with a 500g carbon fork
- Dynamo friendly: internal routing in the fork, and the Di2 ports double as routing for a rear dynamo light
- Serviceable: threaded bottom bracket and replaceable dropout inserts
Specification
- Frame: Reynolds 725 heat treated chromoly main triangle, Reynolds 520/500 rear triangle, ED coated
- Fork: full carbon, 1 1/8 to 1.5 inch tapered, mudguard mounts, internal dynamo routing, 12x100mm thru axle included
- Rear: 12x142mm thru axle included, replaceable dropout inserts
- Brakes: flat mount disc, 160mm max rotor
- Tyre clearance: 700c x 38mm, or 32mm with full mudguards
- Seatpost: 27.2mm, 30mm seat clamp included
- Headset: ZS44/28.6 upper, EC44/40 lower (not included)
- Bottom bracket: 68mm ISO threaded
- Chainrings: up to 53-39t double, 50t single
- Two bottle mounts, rear rack and mudguard mounts, Di2 ports
- Weight: 1.97kg frame (medium), 0.50kg fork uncut
- Three year frame guarantee from Brother Cycles
Geometry
| Size | XS | S | M | L | XL |
|---|---|---|---|---|---|
| Seat tube (C-T) | 500 | 520 | 540 | 560 | 580 |
| Effective top tube | 522 | 540 | 557 | 572 | 587 |
| Head tube | 110 | 125 | 140 | 160 | 180 |
| Head angle | 71 | 72 | 72.5 | 72.5 | 72.5 |
| Seat angle | 74 | 73.5 | 73 | 73 | 73 |
| Chainstay | 420 | 420 | 420 | 420 | 420 |
| Stack | 532 | 550 | 563 | 585 | 604 |
| Reach | 369 | 377 | 385 | 393 | 402 |
| Wheelbase | 990 | 995 | 1002 | 1017 | 1032 |
All measurements in mm and degrees.
Ideal for: road riders who want a Reynolds 725 all-road frame and like one of these two colours.
Brother design their frames in London and we build them up on the bench in Bow, a few miles across East London. Bring us a parts list, a pile of components you already own, or just an idea, and we will spec, build and fit it for you. See the full Brother Cycles range, our other framesets, or book a build through our workshop.