The Reserve 37 Zipp ZR1 Carbon Rear Wheel is crafted for riders who demand lightweight responsiveness and real-world durability. With its versatile 37 mm rim depth and precision-built Zipp ZR1 hub, it delivers instant acceleration on climbs, smooth control through corners, and the stability to handle long days at speed. It’s a wheel made for the balance point—where quick handling meets dependable power transfer.

The 37 mm rim depth is engineered for versatility, bridging the gap between low-profile climbing wheels and deeper aero sets. Reserve’s proprietary carbon lay-up produces a rim that’s laterally stiff for efficiency yet vertically compliant for comfort. The aerodynamic shaping has been optimized through CFD modeling to reduce drag across a wide range of yaw angles, ensuring predictable performance in gusty winds. The 21 mm internal width supports 25–32 mm tires, creating a wider, more stable contact patch that lowers rolling resistance and enhances grip. Tubeless-ready and hookless by design, it allows quick setup and lower tire pressures for improved traction and comfort.

At the heart of the wheel, the Zipp ZR1 hub defines precision and reliability. Designed in Germany, it features fully sealed cartridge bearings for smooth, low-friction rotation and a refined ratchet mechanism for fast, consistent engagement. The lightweight alloy shell minimizes rotational mass while maintaining excellent strength, and the optimized flange geometry balances spoke tension for consistent lateral stiffness. Available with either SRAM XDR or Shimano HG freehubs, it ensures seamless drivetrain integration, crisp shifting, and efficient power delivery across every gear.

Each wheel is hand-built with 24 Sapim CX-Ray bladed spokes in a two-cross pattern for optimal stiffness, aerodynamics, and durability. The asymmetric spoke bed evens tension between drive and non-drive sides, maintaining long-term trueness under load. Reserve’s meticulous build process guarantees perfect dish, spoke balance, and alignment from the first ride onward. The result is a rear wheel that feels snappy on climbs, planted through descents, and confident under power—performance that lasts season after season.

For riders who seek speed, stability, and a truly refined feel, the Reserve 37 Zipp ZR1 Carbon Rear Wheel represents the perfect blend of agility and reliability. Lightweight without fragility, aerodynamic without compromise, it’s the ultimate all-round carbon rear wheel—crafted for those who measure performance in precision, not just numbers.