The Reserve 44 Zipp ZR1 Carbon Rear Wheel is built for riders who want one wheel that does it all — light enough for climbing, deep enough for aerodynamic advantage, and strong enough for everyday training. With its 44 mm rim depth and precision-built Zipp ZR1 hub, it combines the smoothness of premium carbon engineering with the reliability of German-designed hub performance. It’s Reserve’s ideal all-round rear wheel — fast, composed, and relentlessly dependable.

The 44 mm rim sits at the center of Reserve’s versatile aero range, offering the perfect balance of low weight and aerodynamic efficiency. Crafted using Reserve’s proprietary carbon lay-up, the rim is tuned for high lateral stiffness under load and measured compliance across rough pavement. The aerodynamic shaping was refined through CFD modeling and field validation, ensuring stable airflow and low drag across a wide range of yaw angles. The 21 mm internal width supports 25–32 mm tires, creating a broad contact patch that improves grip, lowers rolling resistance, and enhances ride comfort. Tubeless-ready and hookless, it simplifies setup and allows riders to run lower pressures for better traction and smoother performance over long miles.

At the core, the Zipp ZR1 hub provides precision and durability with a distinctly refined feel. Designed in Germany, it uses fully sealed cartridge bearings and an efficient ratchet mechanism for consistent, low-friction engagement. The lightweight alloy shell reduces rotational mass, while the optimized flange geometry distributes spoke tension evenly for power transfer that feels immediate and direct. The result is a hub that runs silently, rolls effortlessly, and delivers consistent engagement through countless hours of hard riding.

Each wheel is hand-built using 24 Sapim CX-Ray bladed spokes in a two-cross pattern to balance strength and aerodynamics. The asymmetric spoke drilling maintains even tension between drive and non-drive sides, ensuring long-term trueness and resilience under torque. Reserve’s precision build process guarantees perfect dish, alignment, and tension balance, creating a rear wheel that feels snappy under acceleration, planted under power, and stable through every turn.

The Reserve 44 Zipp ZR1 Carbon Rear Wheel captures the essence of Reserve’s philosophy: aerodynamic performance engineered for the real world. It’s quick to spin up, calm in crosswinds, and efficient mile after mile. Pair it with a matching 44 or 50 mm front wheel for a perfect all-round setup, or run it solo as the foundation of a fast, durable, and endlessly capable wheel system. Speed, precision, and poise — this is Reserve, refined.