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Item # MCW0001

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  • Black, One Size ($874.95)
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Item # MCW0001

The god of stealing races.

It's appropriate that Mercury Wheels' name and logo reference a Roman god who is the patron of, among other things, travelers and thieves. Atop Mercury's M5 Clincher Wheelset, Eric Marcotte journeyed from his day job in Arizona to Chattanooga, Tennessee to nab the 2014 US national championship ahead of the pros of the European peloton. It's the ultimate race wheel for the working cyclist.

If you're in the market for deep dish carbon rims, then you've probably already made the assumption that the number in the M5's name denotes a depth of 55mm. The rim's width is left out, though, and rim width is a big deal these days. The M5 is a solid 23.5mm wide, which means you can run lower PSI for a more comfortable ride that corners with unparalleled confidence. Wider rims also have some counter-intuitive effects when compared to those standard 19mm rims: they actually decrease rolling resistance and increase aerodynamics.

The M5s' construction uses Mercury's Dual Carbon Layer Process, or DLP. DLP blends high- and mid-moduli carbon fibers to tease out the best balance between the lightweight and stiffness of the former and the fatigue-resistance and durability of the latter. DLP also involves the incorporation of basalt fibers in the brake track to reduce heat build-up and increase stopping power. This increased stopping power goes a long way toward addressing the poor braking that is one of the most common critiques of carbon wheels.

The aerodynamic benefits of a deep dish rim are further complemented by Mercury's Seamless Transition Technology (STT), which integrates the brake strip with the rest of the rim in order to eliminate any obstructions to wind flow and reduce drag-causing turbulence. The result of this construction is a wheel that balances the above qualities with considerations of weight for what Mercury claims is its "most popular wheel by far."

The M5s are finished off with Sapim's indefatigable CX-Ray spokes and Mercury's own hubs. The rear hub includes a generous six pawls for an engagement that's as close to immediate as anything we've seen on the market today, and the front hub has an extra-wide 72mm flange for reduced flex under hard efforts and confident stability at speed. Both hubs have a 15mm axle that reduces to accommodate a traditional quick release and two and four oversized bearings in the front and back, respectively.

The Mercury M5 Clincher Wheelset comes with a Shimano/SRAM 11-speed compatible freehub body and includes skewers, valve extenders, brake pads, and rim strips.

  • Steal a march on the competition with carbon race wheels
  • Blend of carbon moduli to balance stiffness and strength
  • Brake tracks incorporate basalt fibers for better stopping
  • Integrated brake track reduces drag-inducing transitional ridges
  • Wide rims straighten allow lower PSI for smoother, faster ride
  • CX Ray Spokes and wide flanges for stiffer overall system
  • Mercury Wheels proves you don't need to spend a fortune to race on carbon

Tech Specs

Rim Material:
carbon fiber
Wheel Size:
700 c
Tire Type:
Rim Depth:
55 mm
Rim Width:
[external] 24 mm
Brake Compatibility:
Mercury Pro
9mm quick-release
Sapim CX-Ray
Spoke Count:
20 / 24
Actual Weight:
Black, One Size: 1660g
Recommended Use:
Manufacturer Warranty:
2 years

Reviews & Community


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Unanswered Question

Hey CC. I'm about to pull the trigger on a set of these, but I was wondering what the year/build date is on these? Thanks!

How is braking in the wet, and how does it compare to Mavic Exalith's and HED Jet blacks in terms of stopping power.

Hey Hans - The Exalith and HED Jet Black have these beat in terms of braking, but they are solid wheels nevertheless. Could be a great crit wheel or trainer set when riding flats. Let me know if you have any other questions.

How is braking in the wet? And how is braking compared to those with carbon brake tracks?

Avg. ride time: 10m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Love these!

  • Familiarity: I've used it several times

These are amazing!

Love these!

I just bought two sets of these last night. One for me and one for my wife. I was wondering how to tell if I got the newer style Mercury brake pads and how I could get them.

Yeah. So the old brake pads look a little dull almost porous where the new ones are a more dense shiny look. Both work but the new ones are much better. Go to mercury wheels web page. You can get them there. Or better yet call their customer service and talk to Karen. She is awesome and will steer you in the right direction. I've had the wheels for a full season. And honestly can't say enough good things about them! Mercury Rocks!!

Over 2,000 Miles On These This year

  • Familiarity: I've put it through the wringer

Can't say enough good things about these wheels. Now, they're certainly not as light as my 38mm carbon tubulars, but for the money and replacement tire prices, they win hands down. I got these from CC on sale (on sale) back in late December 2015. At that time they were deeply discounted and on that particular day had an extra 10% off. I'm about 185 lbs and use these as my every day wheels. I've never had to true them at all. They just go and go. Brake track seems to hold up nicely,, given that around here we don't have a lot of long descents. I have hauled them down to 10 mph from 40 mph a couple of times tho with no issues. There is only one very small 'thing' re: the valve stems. If you are using tubes with valve stems that have no threading for a knurled nut, the valve stem will rattle against the rim opening. My solution: wrap a couple of rounds of black electrical tape around the stem just at the place where the stem comes through the rim to the outside. Rattle solved.

Will these work with 10sp shimano? Does it come with spacer?

Yes, the wheels are 10 speed compatible (that's how mine are set up). And yes, the spacer is included.

Does anyone use the M5's in Cyclocross? How durable \ stiff are they?

Hi Timothy! I'm 200 lbs and had never had issues on the road. I don't know of anyone who uses these for cross but I wouldn't hesitate. Give me a shout if you have any other questions or would like to place an order. 801-204-4557

1. Are the included brake pads the newer generation (less noisy as some reviewers have mentioned)?

2. Are there any maximum rider weight guidelines from Mercury?

The new pads are included in all wheelsets and there is no rider weight limit. If you have any additional questions or to place an order, feel free to contact me directly :

My Schedule is as follows:

Mon-Thurs: 7am-530pm MST

I can be reached at, on Chat as Sean Z, or by phone at 801-736-6396 x 4739

Incredible Wheels at any price!

  • Familiarity: I've put it through the wringer

Always looking for a good set of wheels, I took a chance on the Mercury M5 clinchers. I was a bit nervous since the price was right for my wallet (low enough for my wife not to notice), but researched them enough to find they are hand built in the US with their rims originating from taiwan.
The initial brake pads were a bit noisy, so I emailed Mercury directly. They informed me they have a new brake pad (changed the compound) and actually sent me a free set and even threw in a t-shirt. The new brake pads solved the noise issue and seemed to add a better braking performance to boot.
I have been riding these wheels for most of this season and wanted to wait to write a review until I had a few miles on them. I am giving them two thumbs up and am even considering buying a set for my wife.

Horrible, avoid at all costs

  • Familiarity: I've used it several times

When I got these I was super excited. I had done a good level of research and have been using carbon deep dishes tubular/clinchers for years, from Corima's to Zipps to Chinese knock-offs.

These are worse than Chinese knock-offs. Once set-up they have rolled incredibly sluggishly, and lethargically. I'm getting out rolled down descents by 120 lb kids with Gatorskins.

Also they are horrible in braking, and their stock pads are complete crap. The fact that you must use their pads or it voids the warranty should speak VOLUMES to how horrible the layup and schedule pattern on these are. I wish I could return them, and I'm really disappointed with CC for continuing to carry them and back them so heavily.

I was hoping to have a set for Road races and Stage races where flatting was more of an issue and I wouldn't be using my tubulars. I'm just hoping I can somehow make up the loss of money I've endured from investing in this horrible off-brand wheelset.

Stick to the major players, they are there for a reason and they are ridden by most for a reason, they work.

Sorry to be a bother mate, but all wheel companies tell you to use their pads. Zipp allows Zipp pads and 1 type of swiss stop or you void the warranty. Same with Enve. When you say they are lethargic, what do you mean? You feel slow? Train more. If your hubs are dragging that badly, get them fixed. Don't leave trash reviews on an otherwise reliable site. Someone might see this and decide not to purchase a good set of wheels at a cheap price because someone prattled on foolishly.

I'm really surprised you're having such problems. I've experience none of the issues you have. The stock pads have been comparable to other carbon rims I've ridden and the rolling you are describing is exactly the opposite of my experience. Are you sure you don't have a pad rubbing or something?

Shit Gatorskins on great wheels? I wonder why they feel like they roll like crap?

Great set of wheels

  • Familiarity: I've used it several times

I'm a proponent of, 'you get what you pay for' so I was a little skeptical when the M5 wheel set was offered by CC at such a reduced price. I did some research and couldn't find anything negative. Decided to give it s go and purchased them. Loving the ride they provide. From my former Fulcrum wheels these are lighter, faster and smoother. No squeals on the brakes even as I applied them at 40mph. Well worth every penny, no; worth what the original asking price is, just a whole lot nicer when you save over a grand.

Great wheels - can't beat the price

  • Familiarity: I've put it through the wringer

I've been using these as my everyday/groups wheel and race wheel and they are great. They really come alive when you get up to speed and I'd recommend them to anyone. Parts are from over seas but wheels are hand built in Utah so I don't think quality control is an issue. They've seemed to stay true over the past few months I've run them. I like them more than the Mavic ksryium SLRs & 2009 zipp 404s I've owned in the past ( hubs aren't as good but I will be replacing the novatecs with tunes in the future). Wheel profile is great, similar width and design to ENVE.

My only suggestion would be to buy quality brake pads at the time of purchase. The braking is manageable if you have adequate time to stop, but on steep descents with tight corners, stop signs or red lights these pads are LOUD and get HOT quick. Gets fairly embarrassing when everyone smells your burning brake pads and hears your ear piercing tires squeak. I'll be getting some swiss stop black princess and I'll report back on those.

Mercury warranty only covers use of Mercury pads. Toe them in, or, buy the newer version of pads from Mercury.

Will these support 28 mm wide tires?

Hi Dennis! Yes, the M5's are 25mm wide and as long as you have clearance in your frame and fork, the wheels will work just fine. Give me a shout and I'll set up an order for you. 801-204-4557

Are this hub built in ceramic, because doesn't metion anything in the full description...

Hi Dalmiro! Typically, unless stated otherwise, hub bearings are steel. These are Novatec hubs with steel bearings. I have been using these hubs for years without a single issue. Give me a shout and I can get an order going for you. 801-204-4557

What is date of manufacturer or production?

Hi Dee! The current batch we have in stock were just delivered in the last 2 weeks, which means they were manufactured and laced by hand here in Utah in the last month. Give me a shout with any other questions. 801-204-4557

The Wheels of Champions

  • Familiarity: I've used it several times

These wheels are amazing and at an amazing price they can't be beat. They are my first set of Carbon wheels the performance difference coming from aluminium wheels is incredible. As soon as i get over speeds of 18 MPH you really really start noticing the Difference . The only reason i gave them 4 stars is because of the brakes that they came with. I mean Yes they stop you.. But everyone from miles around will here you stopping. Even after toeing in the pads they were still incredibly loud. Also they seemed to wear down so extremely fast. You are better off just buying the nicer version of Mercury pads from the get go. other than that no complaints what so ever.

The description doesn't say if these are compatible with shimano or campy. Only one option but not sure which these are. Please clarify. Thanks

If you read the full description it will tell you that these wheels are Shimano/SRAM wheels.

Avg. ride time: 36m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

What is the internal width on these rims? I haven't been able to find this anywhere online..

Sorry, didn't see your question below about tires until today. If you haven't bought a set yet, I'm running 25mm GPs and love them.