We got a first glimpse at a prototype of UK Brother Cycles’ Stroma steel road bike a year and a half ago. But the time since has been well-spent, as the Stroma evolved into a more versatile, affordable all-rounder. This is the kind of modern steel road bike that will be just as happy attacking summertime road rides, as it will churning wet base miles with full-coverage fenders and fat tires all winter long.

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

The Stroma has in fact been I development for three years now, behind the Brothers’ star Kepler gravel & Big Bro adventure mountain bikes. What started as a tight clearance, crit racy rim brake 853 road bike morphed into this fat-tire disc brake endurance 725 all-road machine. I’d say that is a solid transformation, fitting more into the versatile ethos the two brothers have put into the rest of their bike lineup.

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

Intended to be your year-round road bike, the Stroma is TIG-welded in Taiwan from a happy medium heat treated, double-butted Reynolds 725 chromoly steel tubeset, then ED electrocoated to prevent rust.

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike geometry

Geometry for the bike is designed as a happy medium too, balancing quick handling angle with a slightly longer wheelbase for 4-season stability. Named for a remote island off the northeast coast of Scotland “battered by ferocious weather and near impenetrable tides”, this is meant to be an affordable road ride that you will want to ride every day, no matter the weather outside.

Stroma – Tech details

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

The 725 steel Stroma gets the highlights of modern road bike details – 44mm headtube for 1.5″ tapered steerer forks, 12mm thru-axles, flat mount disc brakes for 160mm rotors, and external cable routing but still with Di2 cable ports.

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

It sticks with a 27.2mm seatpost, 28.6mm band clamp front derailleur, 68mm threaded bottom bracket, a standard pair of water bottle bosses in the main triangle, and includes front & rear full fender mounts, plus braze-ons for a rear rack as well.

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

The Stroma is rated for maximum 700 x 32mm tire clearance, or up to ~28-30mm tires with full mudguards. It is intended to get a traditional road groupset build, so there is room for up to a 53/39T double crankset. Claimed weight for a medium size frame is 2000g, plus another 500g for the uncut fork.

Brother Stroma – Pricing & availability

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

The black & white (OK, light gray) all-road Stroma is available now for pre-order as a £899 frameset (£750 without VAT for buyers outside of Europe), including the Reynolds 725 steel frame with seatpost clamp and Brother’s full monocoque carbon fork. A headset is not included, but fits a pretty standard ZS44/EC44 setup for the tapered fork. First deliveries of the new frameset are expected to head out from the UK office in the last week of March.

2020 Brother Cycles Stroma Reynolds 725 steel all-road bike

Brother Cycles is not expected to offer complete bike builds of the Stroma in the near future, but their Builds page offers a nice suggestion of how their customers build up their custom rides.

BrotherCycles.com

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Dolan Halbrook
Dolan Halbrook
1 year ago

Pretty bike. Add some PDW fenders to that build!

Velo Kitty
Velo Kitty
1 year ago

Good looking bike. Price to the US for a frameset (including shipping) is about USD $1,085 at the moment.

threeringcircus
threeringcircus
1 year ago

Beauty!

A
A
1 year ago

I wouldn’t exactly consider a $1000+ frame set with no current option for a complete build “affordable”, but a looker non the less

Daniel M
Daniel M
1 year ago

Get back to me when you have a matching steel fork to go with it.

It makes me sad to see how many small builders only build 2/3 of a bike frame these days. Adding a generic carbon fork to your road frame and a generic suspension fork to your MTB frame gets the job done, but always seems like a cop-out to me.

Anonymous Coward
Anonymous Coward
1 year ago
Reply to  Daniel M

You were doing ok until you said “generic suspension fork.” The last thing I want is a frame manufacture to dictate my fork choice.

mbbm
mbbm
1 year ago
Reply to  Daniel M

Steel fork for 1,5″, flat mount discs and thru-axles is a rarity, probably because of wright. Classic 1″ forrk for calipers is much lighter.

Ol' Shel'
Ol' Shel'
1 year ago

They did a great job integrating the motor and batteries, and all at a great
price!

Ian
Ian
1 year ago

“as it will churning wet base miles with full-coverage fenders and fat tires all winter long”

Funny, it’s churning out wet cold base miles in Scotland that put me off disc brakes, nothing so loud as a wet cold disc brake dripping with road spray and rain! SRAM, Shimano, TRP, organic and sintered, all the same.

Ironic that I’ll only ride my disc brake bikes on dry days now!

Hung
Hung
1 year ago

All pretty but…..the brake side chainstay dropout? What’ this???

It’s like a chainstay premature termination. Haven’t seen this before.