The Reserve 50 Zipp ZR1 ST Carbon Rear Wheel is built for riders who live in the fast lane—where aerodynamics, drive stiffness, and long-term reliability matter most. With its 50 mm rim depth and precision-engineered Zipp ZR1 hub, this rear wheel is designed to turn every pedal stroke into efficient forward motion. It’s the ideal companion for the rider who wants the speed of a deep wheel without losing the composure and control that Reserve is known for.

The carbon rim’s 50 mm depth sits at the sweet spot between aerodynamic advantage and all-condition stability. Reserve’s proprietary lay-up creates a rim that’s torsionally stiff for power transfer yet vertically compliant enough to absorb road texture. The aero profile has been refined through real-world airflow modeling, maintaining predictable handling in crosswinds and delivering measurable drag reduction at higher speeds. The 21 mm internal width supports 25–30 mm tires, giving a wide, stable base that enhances grip and lowers rolling resistance—perfect for modern high-volume road setups.

At the center of it all, the Zipp ZR1 ST hub defines mechanical precision. Developed in Germany and built with fully sealed cartridge bearings, it spins effortlessly and quietly over thousands of miles. The refined ratchet system provides quick, reliable engagement when you surge on climbs or launch into a sprint. Optimized flange geometry ensures balanced spoke tension and lateral stiffness, giving the drivetrain immediate, responsive feel under torque. Paired with a Shimano HG freehub, this version integrates seamlessly with your preferred groupset, transferring every watt through a clean, friction-free interface.

Each wheel is hand-built using Sapim CX-Ray bladed spokes for an ideal blend of lightness and strength. The two-cross lacing pattern maximizes torsional rigidity under load, while the asymmetric spoke bed balances tension across drive and non-drive sides for long-term trueness. The tubeless-ready, hookless rim design simplifies setup and allows lower pressures for improved comfort, traction, and rolling efficiency. From explosive accelerations to steady tempo efforts, the Reserve 50 ZR1 ST Rear Wheel delivers the kind of smooth, efficient performance that rewards every ounce of effort.

Light, fast, and engineered to last, it’s a rear wheel built for racers, endurance riders, and perfectionists who expect uncompromising precision. Whether you’re chasing a finish line or a personal best, this wheel transforms raw power into speed you can feel—smooth, silent, and relentlessly fast.