S4 Rim Brake

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   Handmade in Northern Utah since 2008
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The perfect blend of climbing power and aero: The S4s, designed after our world's fastest wheel, bring a slightly shallower depth for a smooth ride maximizing performance. You will feel faster on ascents, more comfortable on descents and more stabilized in cross wind situations.

- Depth: 45mm 

- Width: 21/28mm

- Weight: 1270g

Speed Guarantee:

We offer a 100% satisfaction guarantee: the S4 is hands down the fastest wheel in it's class. Our mission is to create a professional-quality wheel for everyone.

Quality:
Mercury Wheels are engineered in the US and hand assembled at our facility in Ogden UT.

Your wheels come with a two year warranty. For more info see:
mercurycycling.com/pages/warranty

• Aero / STT
  

  The big challenge for wheel engineers is to reduce weight while maintaining aerodynamics. Typically these design elements are not available in a sub $1k wheel. Luckily, we already made the fastest wheel in the world and translated some of these into the S4.
  

  Using Mercury's Seamless Transition Technology (STT), we;ve integrated 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 is a wheel that shares the aerodynamics of a deep dish or solid disc, while being much lighter.
  
  As a result, the S4 is Mercury's most popular wheel by far.

   

  Spokes + Hub
  A professional wheel builder will build your wheel by hand. The S4s come with Sapim's indefatigable Race spokes and Mercury's custom hubs. We've found this combination, particularly our low friction sealed-bearing hub, brings an engagement that's as close to immediate as anything we've seen on the market.
  
  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 that reduces to accommodate a traditional quick release and two and four oversized bearings in the front and back, respectively.

  DLP

  The S4's 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.

   

• Rims / Size: Mercury S4C / 700c

  Clincher / Tubeless Compatible

  Depth: 45mm

  External Width: 27mm / Internal Width: 17mm

  Hubs: Mercury sealed bearing

  Rim brake - QR x 100/130mm / Disc brake - 12 x 100 / 12x142mm

  Spokes: Sapim Race

  Weight in grams: Rim - 1625g / Disc - 1650g per set (+/- 2%)

   

  What's included: Snap-style rim strips, valve extenders, cassette spacer, brake pads and quick release skewers (rim brake version only)
  
  Warranty Info: Your wheels come with a two year warranty. For more info see:
  mercurycycling.com/pages/warranty