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Mercury WheelsS5 Wheelset - Tubeless

Sale 27% Off$725.09 - $749.99

Item # MCW1WUJ

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  • Black, Shimano HG ($749.99)
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Item # MCW1WUJ

The Mercury S5 Road Wheels are designed for all-around performance, featuring a 50mm rim depth that boosts aerodynamics without sacrificing versatility. The refined carbon construction yields a stiff rim with responsive steering, with a bit of added compliance for rough roads. Tubeless compatibility allows you to run slightly lower pressures for improved comfort and grip, as well as increased puncture resistance.

The S5's construction uses Mercury's Dual Carbon Layer Process, or DLP. DLP blends high and mid-moduli carbon fibers to offer 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 S5s are finished off with Sapim's reliable Race spokes and Mercury's own hubs. The rear hub includes a generous six pawls for snappy engagement, and the front hub has an extra-wide 70 millimeter flange for reduced flex under hard efforts and confident stability at speed. Both hubs have an oversized axle and oversize sealed bearings that work together to ensure stiffness and long-term durability.

  • Carbon fiber road wheels designed for all-around performance
  • Carbon layup finds the ideal balance of stiffness and compliance
  • 50mm rim depth offers aero gains without giving up versatility
  • Reliable Mercury sealed bearing hub with snappy engagement
  • Tubeless compatibility for increased grip and comfort
  • Hand-built in Utah by Mercury's expert wheel builders
  • Includes rim strips, valve extenders, cassette spacer
  • Rim brake only, quick-release skewers included
Tech SpecsWeight
Tech Specs
Rim Material
carbon fiber
Wheel Size
Tire Type
tubeless, clincher
Rim Depth
Rim Width
[internal] 17mm, [external] 27mm
Brake Compatibility
Mercury sealed bearing, 6-pawl freehub
Front Axle
9mm quick-release
Rear Axle
130mm quick-release
Mercury quick-release
Sapim Race
Spoke Count
24 / 24
Recommended Use
road cycling
Manufacturer Warranty
2 years

Claimed Weight

Claimed weights are provided by the vendor.

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[set] 1660g

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Unanswered Question

Did they come with brake pads?

Unanswered Question

It says 'shimano HG' -- does this refer to modern shimano 11-spd cassettes? I have a 2017 Cannondale Synapse and want to make sure it's compatible with my 105 cassette/build. Thanks!

S5 goodness!

  • Familiarity: I've used it several times

I needed a new set of wheels for my older Basso that was affordable. The S5’s make for a great all-around wheel set that can be used for both training and racing. Smooth rolling hubs and with the gray decals they look good.


  • Familiarity: I've put it through the wringer

I needed a set of carbon wheels for my older Cervelo P2 that wasn’t going to break the bank. What a great set of wheels. This wheelset roll incredibly well. Super responsive with good freehub engagement. Handles crosswinds great with good braking without the noise. True all around performance.

Superb wheelset!

  • Familiarity: I've put it through the wringer

If you are looking for a incredible training and race wheelset that won't break your bank, are stiff, aero, and ready to go, these wheels are for you. Great job Mercury.

What size valve length do you use on the S5 rim with a tube? Thanks

Do these come with the mercury brake pads? On their website it lists them as included but no mention on this listing.


Yes, these come with brake pads.

Great wheelset!

  • Familiarity: I've put it through the wringer

A high quality full carbon wheelset under 1600g + sub $800 wheelset that's actually very good. I’ve had mine for over 2 years and everything is great with them. Highly recommend.

What a deal!

  • Familiarity: I've put it through the wringer

I bought these last year for my older Colnago C60 and couldn’t be more pleased with over 3k on them so far. Easy tubeless setup. Great all around wheelset.

I’m a believer!

  • Familiarity: I've put it through the wringer

With over 4k miles on them. For me much better than my old Jet 6 wheels. I have them on my Tarmac and they ride great. They preform nicely on climbs and descents plus handle crosswinds good. Strong performing all around wheelset. Also they look great with the subtle grey decals. Well done Mercury.

Killer wheelset

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

Bought these and decided to set them up as tubeless. To my surprise these came with the valve extenders and the rim tape needed, even though customer service said they didn't. I used some extra tubeless rim tape on them but I think that may be over kill. The new tubeless tires were extremely hard to get on. I popped one bead in and struggled for 2 days to get the other in and never did. I had to take them to my LBS and it took 3 people and they broke 4 tire levers just to get them on. These are tighter than tight. I doubt I will be able to change them on the road if an issue arises. That's my only down side. These are light and spin with ease.

I noticed that this wheelset is advertised as being "tubeless" instead of "tubeless compatible" or "tubeless ready". If I decide that running tubeless tires is not worth the hassle, can I safely run clincher tires on this "tubeless" wheelset?

What a Deal!

  • Familiarity: I've put it through the wringer

I waited 8 months to write this review to see how the wheels perform. Having over 2100 miles, I can say that I love these wheels. Excellent hand built in the US. The hubs are awesome and very smooth. Coming from stock OE Mavic wheels, these are so much better. Very light and fast with Michelin pro 28c. I’m thinking of buying a set for my wife’s bike. Best carbon road wheel deal out there.

Unanswered Question

Will these wheels fit a a cannondale caad 12 105 .

55 mile initial impressions

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

This wheel set roll incredibly very well compared to other expensive brands. Took them on a 55 mile training ride and instantly noticed they engage very quickly, climb really well, and brakes feel responsive without the high-pitched squealing sound.

Made the leap!

    I finally made the leap into a carbon wheelset since I had an upcoming Fondo. They were perfect on my BMC.

    Made the leap!

    SRAM XDR? Can I use my 11 speed cassette?

    yeah. I have a set of the S5's with Shimano currently and emailed Mercury to inquire about XDR since I am thinking of a new Sram drivetrain.


    • Familiarity: I've put it through the wringer

    I’ve had these for 6 months and they’re great wheels. Silky smooth hubs...roll so nicely. Braking is exceptional even on big descents. Handle really good in cross winds . If you’re looking for a full carbon wheelset this is it. Well done Mercury.

    Yep, great wheelset!

    • Familiarity: I've used it several times

    I love my new S5 wheels. Strong rims and great hub set built very well. They perform nicely on the climbs and descents. Great heat resistance rims. Very impressed.

    Awesome deal and awesome wheelset.

    • Familiarity: I've used it several times

    This wheelset is great , light ,fast , and rolls pretty darn smooth. Really happy with my purchase. Wheels are true and brakes really weel like an alloy wheelset. I'm glad i got the deals.


    • Familiarity: I've used it several times

    I bought these for my Trek Madone and couldn’t be more pleased. Solid all around wheelset.