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Item # MCW0001

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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 55 millimeters. The rim's width is left out, though, and rim width is a big deal these days. The M5 is a solid 23.5 millimeters 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 19 millimeter 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 72millimeter flange for reduced flex under hard efforts and confident stability at speed. Both hubs have a 15 millimeter 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.

Tech Specs

carbon fiber
Rim Width:
23.5 mm
Rim Depth:
55 mm
Front Hub:
Rear Hub:
Sapim CX-Ray
Spoke Nipple Material:
Front Spoke Count:
Rear Spoke Count:
Axle Type:
15 mm
Brake Compatibility:
Front Weight:
704 g
Rear Weight:
876 g
Complete Set Weight:
1,580 g
Recommended Use:
Manufacturer Warranty:
2 years
Actual Weight:
One Color, One Size: 1660g

Reviews & Community


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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. btowery@backcountry.com 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 swall@backcountry.com, 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.

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. btowery@backcountry.com 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. btowery@backcountry.com 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. btowery@backcountry.com 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: 1h 59m 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.

Simple Amazing

  • Familiarity: I've put it through the wringer

…we just won RAAM overall riding M5C’s (special edition graphics) and couldn’t have been more happy with them. They were as true in Annapolis, MD as they were in Oceanside, CA…..

Best deal for Carbon Wheels

  • Familiarity: I've used it several times

I have been looking for a set of carbon clinchers for awhile. I had been looking at China specials but was just to scared to wast my money. Seeing the deal on these buy a reputable company and the two year warranty you cant go wrong. Compared to my 40mm alloy wheels these spin up much faster and just feel faster overall. Of course there is the small issue with everyone saying "nice wheels". The hubs are nice and quiet also. I am super happy with the wheels and the shipping was super fast!!

Best deal for Carbon Wheels

Best Value

  • Familiarity: I've put it through the wringer

Great performance and great value. Fast precise wheels. Includes skewers, valve extenders, brake pads, and rim strips. Valve extenders work with 42 or 48mm Presta valve stems.

Unanswered Question

if you go tubeless, do the extenders work well with the tubeless valve stems?? Also, does it come with tubeless valve stems, or is that extra??? thanx