Chris King R45D Hub

Unlike traditional pawl systems that engage at specific points, the RingDrive uses a proprietary ring gear mechanism that engages simultaneously across the entire surface. This provides 45 points of engagement, resulting in near-instant power transfer and exceptional durability under high torque.

No, the R45D is designed for straightforward maintenance. You can access and service the angular-contact bearings without needing proprietary tools, making it easy to keep the hub running smoothly over its lifespan.

The R45D is highly versatile and supports Shimano HG, SRAM XDR, and Shimano Micro Spline freehub bodies. You should verify your specific cassette standard before purchasing to ensure a perfect match.

Angular-contact bearings are designed to handle both radial and axial loads simultaneously, which is critical for wheel stability during cornering. Unlike standard bearings that wear out over time, these are engineered to wear in, meaning they actually perform better the more you ride them.

While the R45D is a road-focused hub, its robust construction and disc brake compatibility make it an excellent choice for gravel builds. The 32-spoke count provides the structural integrity needed for rougher terrain and mixed-surface riding.

Centerlock provides a more secure, consistent interface for your brake rotors, which often leads to easier installation and removal. It also allows for a cleaner aesthetic and is generally considered more efficient for wheel builds using disc brakes.