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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: 1630g
Speed Guarantee: We offer a 100% Satisfaction Guarantee. Don't let the price fool you, the S4 is a professional-quality wheel.
Quality: Mercury Wheels are engineered in the US and hand assembled at our facility in Ogden UT.
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.
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
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