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  • Mercury Wheels M3 Carbon Disc Road Wheelset - Clincher
  • Mercury Wheels M3 Carbon Disc Road Wheelset - Clincher Rear
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Mercury WheelsM3 Carbon Disc Road Wheelset - Clincher
Sale 65% Off$822.15 $2,349.00

Item # MCW000Q

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  • Black, 12/15x100/12x142mm, Shimano/SRAM ($822.15)
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Item # MCW000Q


It's easy to get caught up in the Europro kerfluffle around disc brakes and heated discussions of their place in the peloton, but one ride on that new disc-equipped steed and you'll understand why discs are the way of the future with powerful modulation that far outpaces even the best rim brakes on the market. Although you're definitely on board with discs, you're not as stoked on the stock wheels your bike arrived with and it's time to add a bit of carbon bling in the shape of Mercury Wheels' M3 Carbon Disc Road Clincher Wheelset.

The M3's 30mm depth strikes an all-purpose balance between straight-line speed and crosswind stability while remaining light enough to satisfy our high-mountain climbing ambitions. At first glance, the 16mm internal width may sounds paltry compared to the ever-more-mammoth current rim width trends, but falls right in line with recommendations for an ideal width to house the 25 and 28mm tires so commonly found within the peloton. That 16mm rim is also compatible with 23mm tires, allowing the traditionalists among us to make the jump to disc without also having to change tire type.

  • A disc-equipped carbon wheelset with all-round capabilities
  • Carbon fiber rim construction lowers weight and boosts stiffness
  • Rim depth balances aerodynamic speed and light weight for climbing
  • Durable, machined aluminum hubs roll fast and smooth
  • 4-pawl freehub responds quickly to pedal input
  • Compatible with 6-bolt disc rotors
  • Includes end caps for 12mm and 15mm front thru-axles
Tech SpecsWeight
Tech Specs
Rim Material
carbon fiber
Wheel Size
Tire Type
Rim Depth
Rim Width
[internal] 16mm, [maximum external] 25mm
Brake Compatibility
6-bolt disc
Mercury Disc J-bend
Front Axle
12 x 100mm thru-axle, 15 x 100mm thru-axle
Rear Axle
12 x 142mm thru-axle
Sapim CX-Ray
Spoke Nipple
black alloy
Spoke Count
Recommended Use
Manufacturer Warranty
2 years

Actual Weight

Actual weights are measured in-house by the Competitive Cyclist team.

Have questions? Chat with a Gearhead



Black, 12/15x100/12x142mm, Shimano/SRAM

Claimed Weight

Claimed weights are provided by the vendor.

Have questions? Chat with a Gearhead


Reviews & Community


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Great wheelset at a great price.

  • Familiarity: I've put it through the wringer

I upgraded my stock Trek wheels a few months ago to these M3 wheels and couldn't be happier. Currently running 28c Michelin tires which makes for the right combo. The wheelset is very responsive and stays true even after heavy riding on rough roads. Great rolling hubs.

If you have QR hubs read the fine print

  • Familiarity: I've used it once or twice and have initial impressions

I'm sure these wheels will be great, once I get them installed. If you have quick release hubs, you will need end caps to make the M3's compatible. The M3's do come with end caps for the front wheel, per Competitive's description, but you will have to purchase the rear caps which Competitive does not carry. The Mercury customer rep. has been really helpful but it has been a couple of weeks and another $35 to get this sorted. Thus, this review is really more for my experience with Competitive (not misleading but unclear, IMHO) than the quality of the wheels themselves.

Smooth Sailing

  • Familiarity: I've put it through the wringer

These have been superb wheels. I was a little hesitant on the depth just because a lot of friends are on 50mm depths but these things feel just as snappy while putting the hammer down, plus long hours in the saddle are far more comfortable.
Thought about throwing them on a cross bike but not too sure if they will fit a 32c tire well enough. The 25c slicks fit great and haven't ever struggled getting a tire on and off, currently running some Conti's.
Mercury said they were tubeless compatible but after talking to my LBS I don't really see the point.
Just over a thousand miles so far and still as straight as an arrow. Highly recommend!

Road Disc!!

  • Familiarity: I've put it through the wringer

I just moved to a hilly area and decided to give the road disc brake a chance for the better braking performance. It is quite a bit different than my usual rim brake rig, but I like it so far.
I wanted a real set of wheels instead of the standard crappy wheels that came with my bike, so I started my search.
I found the Mercury M3's to be decently light and at the right price. After some research, I found out they are hand built in the US.
Great set of wheels and am really happy with them. I decided on the shallower depth wheels instead of the racier ones since I am riding longer distances and wanted a more comfortable ride. I found them to be responsive, but not overly stiff.

Are these tubeless compatible? Thanks

I have them set up with a set of Maxxis Padrones with tubeless tape that is specific to road bikes since it can handle higher tire pressure. I used orange seals sealant with a set of tubeless valves. They were really easy to set up.