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Merlin ROC Disc 105



A versatile all-weather road machine with a very pleasant ride feel that is just as happy off the beaten track

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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Merlin is offering a decent package here with its ROC Disc 105. An alloy frame, carbon fork, hydraulic discs and a Shimano 105 groupset all for less than a grand is impressive against some of its big brand opposition. Yeah, it's a bit on the weighty side but it offers a very good ride quality to offset that.

  • Pros: Decent tyre clearances, hydraulic discs for less than a grand
  • Cons: Weight hampers climbing and acceleration


At its heart the ROC uses a triple-butted 6061 aluminium alloy frameset and a carbon fibre fork (well, half of it anyway as the steerer is alloy). It's a comfortable setup.

The frame doesn't feel harsh; okay, it's not got the comfort of a sorted carbon frame but its ride quality is more akin to something made of steel than the harshness often associated with aluminium alloy. There is little buzz from the road surface and on the whole it is a pleasant place to be.

Merlin ROC Disc riding -2.jpg

Picking up the ROC, the first thing you notice is how much it weighs – 10.72kg isn't unheard of for a bike of this type, and out on the road it gives the Merlin a planted feeling which is exactly what you want when the road surfaces are wet and greasy.

When you come to hitting the hills, though, it can take the edge off and getting out of the saddle doesn't really deliver any huge benefits to your climbing. You're better off sitting there and tapping out a rhythm in as high a (low) gear as you can muster.

Merlin ROC Disc riding -3.jpg

Sprinting is pretty much out, too, but then that isn't really what the ROC is all about.

The ROC makes for a decent commuter or day-long tourer. It has that kind of 'unflustered' style about it – just get on it and pedal and it'll carry you for miles with little demand for concentration, you can just enjoy the scenery.

That's not to say the Merlin can't deliver a bit of fun when required. On this 56cm frame you get a 55cm top tube and 15cm head tube so it is not exactly an upright position. You can get down in the drops and power along out of the wind, and when you hit the bends the 73-degree head angle means the steering is on the nervy side of neutral.

Merlin Roc Disc 105 - head tube.jpg

When descending, the quickish steering combined with that surefooted feeling from the overall weight means you can carry quite a bit of speed through the bends without the bike feeling skittish if the surface is far from ideal.

Without mudguards, the ROC can take a mid-sized gravel tyre, around 35mm to 38mm depending on the profile, so you can take to the stony tracks and hardcore byways, where the handling doesn't feel overly twitchy either.

It pretty much just takes everything in its stride.

Frame and fork

The frame itself is nothing flash as there is no oversizing this and slimming of that to increase stiffness or remove it, it's all rather traditional. There is even a BSA threaded bottom bracket setup.

Merlin Roc Disc 105 - bottom bracket.jpg

It's nicely put together and I like the grey and blue paintjob – it all looks quite classy.

Merlin Roc Disc 105 - seat tube decal.jpg

The cables and hoses are all fed internally through the main triangle before exiting around the bottom bracket area, then travel along the chainstays to the flat mount rear brake calliper and rear derailleur.

Merlin Roc Disc 105 - cable routing.jpg

Wheel retention front and rear is by quick releases rather than thru-axles screwing into the frame, but that isn't uncommon at this price point.

Merlin Roc Disc 105 - front hub.jpg

There are mudguard mounts front and rear and with these fitted you can still get a 30mm tyre into there quite comfortably according to Merlin. The ROC comes with 28mm fitted as standard and without guards you can see there is plenty of room to go bigger, as I mentioned above.

Merlin Roc Disc 105 - fork clearance.jpg

There are rack mounting points on the seatstays, too, if you want to fit one for commuting or a spot of touring.

Merlin Roc Disc 105 - seat stays.jpg

Finishing kit

As the name suggests, this ROC comes with a predominantly Shimano 105 build, though there is an Ultegra version available too.

Our test model came with the 5800 series of 105 rather than the latest R7000 version we recently tested, but I'm guessing that as stock levels run out of the older version then this could change.

Merlin Roc Disc 105 - drivetrain.jpg

The shifting is absolutely fine anyway – 5800 was always a highly regarded groupset here at The RS505 non-series shifters/hydraulic brake levers aren't my favourite shape but they do the job and the braking performance is decent. The 140mm rotors front and rear offer all the bite you really need for a bike like this in my opinion.

Merlin Roc Disc 105 - bar and shifter.jpg

Gearing-wise the ROC uses a non-series 50/34 chainset, though its shape and colour don't make it obvious that it isn't a 105 model.

Merlin Roc Disc 105 - crank.jpg

That is paired with an 11-32t cassette, which offers a decent spread of gears for most, especially on the road, though it might be a touch high if you use the Merlin consistently on gravel tracks.

Merlin Roc Disc 105 - rear mech 2.jpg

Merlin uses basic alloy components from Kalloy and it is exactly as I'd expect to see here for this kind of money. The handlebar has a compact drop so that you can get plenty of use out of it without having to adopt an extreme position, and it has enough flex to not feel overly harsh.

Merlin Roc Disc 105 - bars.jpg

The seatpost is easy to fiddle with, making it simple to swap or adjust the saddle. As standard, the ROC gets a Merlin branded saddle but our test model came with a Charge Spoon so I can't really comment on the former.

Merlin Roc Disc 105 - saddle and post.jpg

Wheels and tyres

For a bike like this, the ROC needs strong wheels and Merlin has specced Mavic XM319 Disc rims paired with Shimano RS505 hubs. With 32 spokes front and rear in a 3-cross pattern, they'll stand up to plenty of abuse on the gravel trails and if you are riding the bike around loaded up with a bag or rack.

Merlin Roc Disc 105 - tyre and rim.jpg

They are hefty, though, and if you are sticking to the road and after a bit of performance then it'd be a good idea to have a spare pair of lighter wheels for those fun days.

I rode the bike through a few potholes and headed off-road a few times with nothing really to report in terms of damage to the wheels or knocking them out of true, they just shrugged everything off.

Merlin Roc Disc 105 - fork.jpg

Schwalbe's Durano tyres have been fitted as standard in a 28mm size and it is a good choice of rubber. They roll pretty well, have decent levels of grip and I've found them to shrug off punctures after a season of using them on my own winter hack.

The competition

I've tested quite a few bikes of this style over the last 12 months or so, and when it comes to value the Merlin is impressive.

The latest version of Ribble's alloy CGR has increased in price since we tested the original, and to get the same groupset as the Merlin you are looking at laying out £1,299. The Ribble can take up to 45mm tyres without guards and 40mm with, and it comes with front and rear thru-axles.

> Buyer's Guide: 15 of the best road bikes for under £1,000

Bianchi's Via Nirone Allroad costs the same as the ROC, but you are only getting a Shimano Sora groupset and poor quality mechanical brakes. The overall ride wasn't that great either.

If you aren't two bothered about massive tyre clearances then you could opt for the Cannondale Synapse Disc alloy version. It'll only take 32mm tyres but the frame delivers a brilliant ride. For £999.99 you'll end up with a Tiagra-equipped option with mechanical disc brakes.


Overall, you can see that the Merlin ROC Disc is a decent all-round workhorse at an attractive price compared with a lot of its opposition. Hydraulic braking is very impressive to see, and despite its weight it is still a quick, fun bike to ride.


A versatile all-weather road machine with a very pleasant ride feel that is just as happy off the beaten track test report

Make and model: Merlin ROC Disc 105

Size tested: Large

About the bike

List the components used to build up the bike.


Frame: Triple-butted 6061 Series Aluminium, Q/R rear dropouts, 135mm spacing

Fork: Merlin Disc with carbon blades, flat-mount disc fitting and alloy steerer, Q/R dropouts

Internal gear cable routing

Internal disc brake hose routing

Flat-mount disc fitting for neater look

Max tyre clearance - 35/38mm Gravel Tyre (without mudguards fitted)


Wheels: Mavic XM319 Disc rims on Shimano RS505 Quick Release hubs

Tyres: Schwalbe Durano Race Guard 700x28


Gear/Brake Levers: Shimano RS505 Hydraulic Brake / Mechanical Gear

Front Derailleur: Shimano 105 5800

Rear Derailleur: Shimano 105 5800 (Med Cage)

Chainset: Shimano FC-RS510 50/34T

Bottom Bracket: Shimano Hollow Tech II (Threaded)

Cassette: Shimano 105 5800 11-32T

Chain: Shimano CN-HG601

Pedals: Not included


Saddle: Merlin Black

Seatpost: Kalloy Uno

Handlebars: Kalloy Uno

Grips: Black Cork Handlebar Tape

Stem: Kalloy Uno

Brake calipers: Hydraulic Shimano RS505 Road Disc

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?

Merlin says, "The Merlin ROC Disc road bike featuring Shimano 105 hydraulic disc brakes is a highly versatile, efficient all-rounder that takes the braking surface away from the rim of the wheel and enhances tyre clearance within the frame enabling you to fit up to 30c width tyres with room for a full mudguard or a 35mm gravel tyre with no mudguard.

This type of versatile all-weather, mixed-terrain road bike has really caught on over the last few years for obvious reasons. With fatter tyres and enhanced clearance between tyre and frame you don't have to stick to smooth tarmac roads; with a full complement of mounts the bike is ready to sport mudguards making it the perfect wet weather road bike.

The Merlin ROC Disc features a triple-butted 6061 Aluminium frame with a comfortable, confident geometry that encourages all-day riding, a carbon fork that stops the ride feeling too harsh when you're on the ruff-stuff and quality Shimano 105 hydraulic disc brakes that deliver consistent, controllable braking in all weathers and riding conditions. A dependable, precise shifting Shimano 105 groupset with wide-ratio gearing completes the package."

It's a bike that is fun and comfortable to ride on the road in all weathers as well as off the beaten track.

Where does this model sit in the range? Tell us briefly about the cheaper options and the more expensive options

There is a more expensive Ultegra option which was £1,599, but is now selling for £1,299.

Frame and fork

Overall rating for frame and fork

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

The welding is neat and tidy and I like the paint colour.

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

The frame uses triple-butted 6061 aluminium alloy tubing while the fork is a mix of carbon fibre legs and an alloy steerer tube.

Tell us about the geometry of the frame and fork?

The geometry is kind of typical of that you'd find on an endurance style bike. The front end is steeper than most gravel bikes but it still manages to work away from the tarmac.

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

As above, the stack and reach are exactly what I'd expect to find for this style of bike.

Riding the bike

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

Yes, the alloy frame has a nice smooth feel to it.

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

Its stiffness levels are perfectly adequate for the type of riding you are likely to do on the ROC.

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

Not too bad, the overall weight takes the edge off, though.

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

No, none.

How would you describe the steering? Was it lively neutral or unresponsive? Neutral.

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

It feels like a very balanced bike, which lets you enjoy riding it whether you are on the flat or dropping downhill.

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

Nothing felt harsh or uncomfortable so I'd say everything is doing its job.

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

Unless I was absolutely hammering it out of the saddle, I couldn't really feel any flex; any that I did would most likely be from around the bottom bracket shell.

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

A change to some lighter wheels would increase efficiency especially when climbing.

Rate the bike for efficiency of power transfer:
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Rate the bike for cornering on descents:
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The drivetrain

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

It's great to see hydraulic brakes here on a bike of this price, though I'm not a huge fan of the shape of these levers compared to the mechanical 5800 versions of 105.

Wheels and tyres

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

They are designed to take on a bit of everything and feel robust. If you are spending a lot of time on the road, though, I'd definitely suggest going for a set of Fulcrum DB 7s or something.

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

I rate the Duranos if you want durability versus performance on a budget.


Rate the controls for performance:
Rate the controls for durability:
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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?

Simple and effective, they all do their job without fuss.

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

How does the price compare to that of similar bikes in the market, including ones recently tested on

A lot of the other bikes we've tested are of similar weight and price, but the ROC is much better specced.

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

Use this box to explain your overall score

A nice quality frame with a great ride feel all wrapped up in a very good value for money package.

Overall rating: 8/10

About the tester

Age: 40  Height: 180cm  Weight: 76kg

I usually ride: This month's test bike  My best bike is: B'Twin Ultra CF draped in the latest bling test components

I've been riding for: Over 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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MrGear | 5 years ago

Hi Stu, I'm thinking about buying one of the and am a similar height and weight to you. Would you say the 56cm frame was the right size with a bit of adjustment either side? Assume you are normally proportioned for someone your height!

Stu Kerton replied to MrGear | 5 years ago
1 like
MrGear wrote:

Hi Stu, I'm thinking about buying one of the and am a similar height and weight to you. Would you say the 56cm frame was the right size with a bit of adjustment either side? Assume you are normally proportioned for someone your height!

Hi MrGear,

I found the ROC to be a very good fit and yeah I'm pretty much normally proportioned. You could tweak the stem length either way if necessary with little effect on the overall handling.


hughsain | 5 years ago

How does this bike stack up against the Triban RC520? Spec looks pretty similar but the Triban is a good bit cheaper. Paint job is prettier on this though IMO.

jollygoodvelo | 5 years ago

Funny how some products just seem to go on and on unchanged.  I have the same wheels on my Boardman.  They've put up with total neglect except an occasional wash, used on-road, on the turbo and a lot of canal path/bridleway hammerings (on 25mm slicks, note) and are faultless.  Unless being a bit heavy is a fault.

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