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Eastway Zener D1 Ultegra



Excellent value for money endurance machine with performance intentions, an awesome sportive-cum-club run bike

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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The D1 is the top-end model in Eastway's Zener endurance range. It looks great on paper, with a carbon fibre frameset, full Shimano Ultegra groupset, hydraulic disc brakes and Mavic wheels, all for £1800, and that positivity is carried through to the road. The monochrome paintjob doesn't hide a colourful ride.

British brand Eastway may have disappeared off the radar for a bit, but thanks to its acquisition by online retailer Wiggle, it's back for 2016 with a brand new line-up.

> Buy this online here

The Zener range contains three models, all of which share the same frame and fork, designed to create a fast ride with plenty of comfort. Most endurance frames have shorter top tubes and a taller head tube to give a slightly more upright, relaxed position. The Zener has this, but not to the extremes we see on some.

eastway zener d1 2.JPG

On our 54cm test model the sloping top tube has a virtual length (measured as if the tube ran horizontally) of 535mm, paired with a head tube of just 140mm. These, when combined with a seat tube angle of 74 degrees and a head tube angle of 72.5, give a stack and reach (the vertical and horizontal measurements from the centre of the bottom bracket to the top of the head tube) of 542mm and 380mm respectively: definitely on the racy side.

The ride

What does all this mean once you get it out on the road? Well, the D1 certainly likes to be ridden hard. It responds well to any input and you certainly feel as if you are getting a decent level of return on your effort.

Acceleration is brisk thanks to the oversized tubes and bottom bracket junction offering heaps of stiffness, especially in the lower half off the frame. You can really grab hold of the bar and whack the power through it for a sprint or short, fast climb.

Eastway Zener - riding 4.jpg

The steep seat tube places you further forward in relation to the bottom bracket, which opens the hip angle, allowing for greater power transfer without compromising breathing. This means once you've got the Eastway up to speed you can keep it there by tucking into the shallow drops of the handlebar. Told you this thing had performance intentions.

To test the climbing and descending, I rode the Zener D1 on the Sheffield round of our team rideouts, which took in a loop of the Peak District. The D1 certainly left me impressed, especially considering it was a relatively unfamiliar bike on totally unfamiliar roads.

The long, steep climbs of the Peaks highlighted the stiffness running through the square section down tube and chainstays, connected by that wide BB86-compatible bottom bracket shell. While the D1 responds well to seated climbing, it's when you're out of the saddle that it really shows its true colours. Not a hint of flex anywhere, and with the shorter than normal top tube you can really stand up and stretch your back.

Eastway Zener - riding 3.jpg

Its 8.63kg (19.03lb) weight doesn't feel relevant when climbing, as the majority of it is in the Mavic Aksium wheels; as long as you keep them spinning, the D1 rides as if it's much lighter than it is.

Once it's time to come down, the Zener has a very surefooted feel, and while the handling isn't razor sharp (changing direction in a high speed chicane, for example, can feel a tiny bit delayed), it is tight thanks to the tapered fork steerer, and well within the expected limits for a bike of this style. The line you aim for tends to be the line you follow, and with plenty of feedback you always know what the Zener is up to beneath you.

The 28mm Continental Ultra Sport tyres offer plenty of grip, easily enough to cope with the braking power of the Shimano hydraulic disc brakes, and they roll pretty well too. For comfort levels you can run these at lower pressures than narrower tyres, which you might well need to because the Zener frame is not the most supple, compared with other similar style framesets running the same tyre sizes and pressures.

Although firm, it does offer a smooth ride; it doesn't resonate or buzz over rough surfaces, so it's not tiring. You know you're hitting the bumps but it's not uncomfortable.

Frame and fork

The frame is full carbon fibre, with internal cable and hose routing for the gears and hydraulic brakes. The fact that Eastway offers a five-year warranty is pleasing to see: it's obviously confident in the longevity of the product.

Eastway Zener.jpg

As I've already mentioned, the head tube is tapered, matching a corresponding fork steerer. The larger diameter at the crown means a stiffer fork, which benefits handling and helps resist braking forces. It also means the junction between the head tube and down tube can be larger than if you were using a 1 1/8in lower race.

At the other end of the down tube you have the BB86 bottom bracket. This uses press-fit bearing cups, allowing the BB shell to be 86mm wide instead of a more traditional 68mm. A larger width here means the down tube can carry that oversize profile from top to bottom, stiffening up the frame.

Eastway Zener - bottom bracket.jpg

Out of this come the square chunky chainstays, transferring power to the rear wheel. The chainstays are quite short, considering the type of bike and the added 5mm width of the disc hub (heel clearance can be an issue), but it does mean the rear triangle feels very tight and responsive.

Eastway Zener - chain stays.jpg

Eastway has stuck with traditional 9mm quick release dropouts, and although some manufacturers are moving to thru-axles when disc brakes are involved, I certainly didn't feel that the Zener suffered in any way.

Finishing kit

This is where the Zener D1 scores particularly well. Shimano's latest 11-speed Ultegra groupset is a beautiful piece of kit, and the direct shifting certainly matches the solid feel of the frame.

The gear ratios are what you'd expect for a bike designed for the sportive scene: a 50/34 chainset with an 11-28 cassette. This offers plenty of options for climbing and top speed work.

Eastway Zener - drivetrain.jpg

The braking is taken care of by the excellent Shimano R785 hydraulic callipers paired with R685 STI units. These aren't groupset specific, but with their carbon levers and light shifting they sit well with the Ultegra derailleurs; you even find them on hydraulic-equipped Dura-Ace-specced bikes.

Eastway Zener - bars 2.jpg

The hydraulic units bring so much modulation to the braking, wet and dry, and while the rear can be a little lively you soon learn you only need to tickle it a bit with two fingers to bring the bike to a complete stop. With the front you can easily grab a handful without losing traction thanks to the 140mm Ice Tech rotor being bang on performance-wise for road use.

Eastway Zener - front disc brake.jpg

The cockpit and seatpost come from Ritchey's Comp range – quality aluminium pieces whose high gloss finish mates well with the Zener's matt one. The Evo Curve handlebar has a shallow drop which means you can get aero enough to duck out of a headwind even if you aren't that flexible. The minimal effect on your centre of gravity compared with a deeper traditional-drop bar means the handling remains unchanged too.

> For more choices, check out our guide to 2016 sportive and endurance bikes here

A colour matched Fizik Aliante saddle sits atop the seatpost, and very comfortable it is as well. Its shape is suited to long hours in the saddle, while being narrow enough to offer thigh clearance if you want to get low and get the power down.

Eastway Zener - saddle.jpg

Wheels and tyres

The marketplace for entry-level disc brake-compatible wheelsets is increasing rapidly, but choices are still pretty limited to just a few brands. Eastway's decision to go with the Mavic Aksium Discs ties in with the sensibly priced and high performing branded finishing kit specced on the rest of the Zener. It gives the D1 one a complete look, if you will, like no corners have been cut to hit a budget.

Eastway Zener - rear wheel.jpg

The Aksiums are robust and will stand up to plenty of abuse, so longevity won't be an issue, though the near-2kg weight takes the shine off the Zener's acceleration just a touch. As I mentioned above, though, it isn't a deal breaker because once they're rolling that speed isn't a chore to maintain.

The Continental Ultra Sport tyres did suffer a puncture from a sharp bit of grit, but on the whole they are decent performers, especially for the autumn/winter crossover of the test period.


The Zener D1 is a great all-round bike, with a quality frame at its heart. Its solid and smooth feeling gives you heaps of confidence, and allows you to push a little harder than you might normally. The reward for working hard is paid back in performance, with the tight frame really responding when you get the power down.

Eastway Zener - riding 1.jpg

Value for money is another big marker for the Eastway. Full Ultegra, hydraulic disc brakes and a full-carbon frameset is impressive for the £1800 price tag, and with the Zener riding as well as it does, it goes to show Wiggle hasn't just tarted it up to disguise a mediocre frame. Everything works well together.


Excellent value for money endurance machine with performance intentions, an awesome sportive-cum-club run bike test report

Make and model: Eastway Zener D1 Ultegra

Size tested: 54cm

About the bike

State the frame and fork material and method of construction. List the components used to build up the bike.

Front Axle Type: 9mm QR

Cable Routing: Internal

Frame: Eastway Full Carbon Endurance Disc frame

Fork Material: Carbon

Fork: Eastway Full Carbon Endurance Disc fork

Steerer: Tapered

Bottle Cage Mounts: Double

Front Derailleur Mount: Braze On

Dropouts: Replaceable Rear Derailleur Hanger

Wheelset: Mavic Aksium One

Brake Levers/Gear Shifters: Shimano ST-R685

Front Derailleur: Shimano Ultegra

Rear Derailleur: Shimano Ultegra

Brake Type: Hydraulic Disc Brake

Brakes: Shimano ST-R685

Brake Callipers: Shimano BR-R785

Chainset type: Compact

Chainset: Shimano Ultegra

Chainring Size: 50 Tooth, 34 Tooth

Chain: Shimano

Bottom Bracket: Shimano

Cassette: Shimano 11 speed

Cassette Range: 11-28 Tooth

Handlebars: Ritchey Comp Evo curve

Bar Tape/Grips: black

Stem: Ritchey Comp 4-Axis

Seat Post: Ritchey Comp

Saddle: Fizik Aliante

Tyres: Continental UltraSport 700x28c

Tell us what the bike is for, and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about the bike?

Eastway says: "Eastway have looked closely on making the Zener's geometry as comfortable and as fast as possible. So whether you are going out for that quick short hack or that long weekend 100 miler the Zener will make sure that you have completed the ride with pace and ease."

For an endurance bike it is certainly on the racier side thanks to that shorter than usual top tube. A great compromise between speed and comfort even considering the stiff frame.

Frame and fork

Overall rating for frame and fork

Tell us about the build quality and finish of the frame and fork?

Very nice quality with a simple paintjob. The whole frameset has a solid feel to it with no rattles or creaks.

Tell us about the materials used in the frame and fork?

The frame is a monocoque construction from carbon fibre, laid up in what looks to be a uni-directional formation judging by the naked finish. The fork uses a similar method.

Tell us about the geometry of the frame and fork?

A slightly shorter than normal top tube matched to a pretty standard head tube length, meaning a geometry closer to a race bike than many endurance bikes.

How was the bike in terms of height and reach? How did it compare to other bikes of the same stated size?

Stack to reach ratio comes out at 1.42 highlighting its performance intentions. Geometry tables are here:

Riding the bike

Was the bike comfortable to ride? Tell us how you felt about the ride quality.

The Zener is stiff but manages to avoid being overly harsh. Other endurance frames, like the Scott Solace for example, have a more supple ride.

Did the bike feel stiff in the right places? Did any part of the bike feel too stiff or too flexible?

Yes, the Zener certainly has no trouble when you lay the power down.

How did the bike transfer power? Did it feel efficient?

The compact frame and oversized BB86 bottom bracket transfers the power from pedals to road well.

Was there any toe-clip overlap with the front wheel? If so, was it a problem?

A little, but no issue while on the move.

How would you describe the steering? Was it lively, neutral or unresponsive? Competent with loads of feedback, very neutral.

Tell us some more about the handling. How did the bike feel overall? Did it do particular things well or badly?

The neutral handling of the Zener makes it a very easy bike to ride. You get loads of feedback from the road through the frame and fork so you always know what the bike is up to. On longer rides when tiredness can start to kick in this can make a lot of difference – you don't have to make decisions or think about what's happening as having all of that feedback means you just react instinctively.

Which components had the most effect (good or bad) on the bike's comfort? would you recommend any changes?

Swapping from the 31.6mm to a 27.2mm diameter seatpost with a sleeve would bring in a bit more comfort.

Which components had the most effect (good or bad) on the bike's stiffness? would you recommend any changes?

The Ritchey steering components are never found wanting when you need stiffness.

Which components had the most effect (good or bad) on the bike's efficiency? would you recommend any changes?

The powerful hydraulic disc brakes make a huge amount of difference to efficiency, especially in wet weather, as you can leave your braking decisions later which means a greater average speed.

Rate the bike for efficiency of power transfer:
Rate the bike for acceleration:
Rate the bike for sprinting:
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The drivetrain

Rate the drivetrain for performance:
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Rate the drivetrain for value:

Tell us some more about the drivetrain. Anything you particularly did or didn't like? Any components which didn't work well together?

Shimano Ultegra is a lovely groupset. Performance is noticeably improved over 105, with not much more of an outlay. When paired with the hydraulic levers and disc brake callipers it's a groupset that is hard to beat. Those shifters and calipers are expensive, though (around £460 online including rotors), which takes the shine off it in terms of value.

Wheels and tyres

Rate the wheels and tyres for performance:
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Tell us some more about the wheels and tyres.Did they work well in the conditions you encountered? Would you change the wheels or tyres? If so, what for?

The Aksium wheels may be entry level in terms of Mavic's line-up but they are solid performers with excellent reliability; only their weight counts against them really. They do offer good long-term value for money.


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Tell us some more about the controls. Any particularly good or bad components? How would the controls work for larger or smaller riders?

The Ritchey Curve stuff looks much more high end than its price would have you believe. Very good long-term quality and the shallow drop of the handlebar makes it perfect for the majority of riders.

Anything else you want to say about the componentry? Comment on any other components (good or bad)

I am a big fan of the Fizik saddle being specced as standard.

Your summary

Did you enjoy riding the bike? Yes

Would you consider buying the bike? Yes

Would you recommend the bike to a friend? Yes

Rate the bike overall for performance:
Rate the bike overall for value:

Use this box to explain your score

The Eastway Zener D1 is a solid bike in the way it's built and the way it rides. It is so easy to live with, anyone of any ability level will get back from it what they put in. It's great to see Eastway has pushed the performance side of the equation as far as it has, as although the riding position is comfortable, you're still getting a bike that offers a spirited ride.

Add that spec sheet to the mix and you've got a great all-round package.

Overall rating: 8/10

About the tester

Age: 37  Height: 180cm  Weight: 76kg

I usually ride: Kinesis T2  My best bike is: Mason Definition

I've been riding for: 10-20 years  I ride: Every day  I would class myself as: Expert

I regularly do the following types of riding: time trialling, commuting, club rides, sportives, fixed/singlespeed

As part of the tech team here at F-At Digital, senior product reviewer Stu spends the majority of his time writing in-depth reviews for, and ebiketips using the knowledge gained from testing over 1,500 pieces of kit (plus 100's of bikes) since starting out as a freelancer back in 2009. After first throwing his leg over a race bike back in 2000, Stu's ridden more than 170,000 miles on road, time-trial, track, and gravel bikes, and while he's put his racing days behind him, he still likes to smash the pedals rather than take things easy. With a background in design and engineering, he has an obsession with how things are developed and manufactured, has a borderline fetish for handbuilt metal frames and finds a rim braked road bike very aesthetically pleasing!

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