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Just in: Enigma Ezona ST, steel road bike with Shimano 105

Enigma's brand new £799 steel frameset comes in for testing

Winter is the ideal time of year to be riding a reliable and comfortable steel road bike equipped with mudguards, and that is exactly what the brand new Ezona ST from Enigma Bicycle Works is. It’s their latest steel frame and costs £799, with the complete Shimano 105 build we’ve got in for review coming in at £1,549.

Enigma Ezona - down tube.jpg

Based down in Sussex, Enigma has carved itself a reputation for beautifully made titanium road bikes in the past decade or so that it has been in operation. It also offers steel for those that don’t have the budget to stretch to titanium, or simply prefer the ride of a good steel frame.

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The new Ezona ST aims to make owning a steel frame a little more affordable. It uses a Columbus Zona double butted tubeset throughout. The frame is handmade in the UK, and there is no doubting the quality of workmanship on show here; it’s exquisitely well made.

Enigma Ezona - rear dorp out.jpg

Enigma uses the same geometry as the long-running Etape titanium touring bike, designed for those who like to ride fast but favour a bit of comfort. It’s slightly higher at the front but not as much as many of the modern sportive bikes with huge head tubes.

The frame will accommodate 25mm tyres with mudguards fitted. It’ll go wider if you remove the mudguards but we reckon most people interested in this frame will be wanting to use mudguards for winter and year-round protection. All cables are externally routed, the headset is integrated and the seat tube accepts a 27.2mm seatpost.

Enigma Ezona - rear brake cable.jpg

Frame weight is a claimed 1,650g for a 56cm, with the complete bike pictured here weighing in at 10.3kg (22.49lb). The frame is available in a choice of three colours; Jaguar Red, VW Ice Metallic or Fiat 500 Blue.

Enigma Ezona - front brake.jpg

Just one build is available for the new Ezona ST, and that features a Shimano 105 groupset with Enigma’s own Etape carbon fibre fork. Enigma also supplies its own aluminium handlebar and stem. Mavic’s Aksium wheels are solid and reliable, and fitted with Continental Ultra Gatorskin 25mm tyres. A Selle Italia saddle sits atop an aluminium Deda seatpost.

Enigma Ezona - cable routing.jpg

Enigma doesn’t offer a bespoke option for this new frame, but it is offered in six sizes from 52 to 60cm. Measurements for our 56cm test bike include a 577mm stack and 383mm reach, a 560mm top tube and 175mm head tube with 425mm chainstays.

More at and a full review in the New Year.


David has worked on the tech team since July 2012. Previously he was editor of and before that staff writer at RCUK. He's a seasoned cyclist of all disciplines, from road to mountain biking, touring to cyclo-cross, he only wishes he had time to ride them all. He's mildly competitive, though he'll never admit it, and is a frequent road racer but is too lazy to do really well. He currently resides in the Cotswolds.

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