Our King of gravel includes our new and improved hub design, the "44" hub. A Beefier hub with bigger internals, featuring 108 points of engagement, help you generate more torque and transfer of power for out of saddle efforts. We upgraded to a 44mm ratchet rings and offer compatibility with Shimano Micro Spline 12-speed and Campagnolo Ekar 13-speed groupset. The "44" hub has been updated to include a slip-fit system to easily swap out end caps to accommodate, 15mm,12mm or QR axles, helping you "future-proof" your wheelset. 
The Spinergy GXX carbon gravel wheelset features a 24mm internal width, which accommodates a wide range of tire sizes ranging from 32mm to 56mm wide. Giving you optimal performance with lateral stiffness and improved cornering stability. Built with our patented PBO spokes to reduce rider fatigue, improve acceleration, and a smoother ride. Ready for your long mixed terrain rides and durable enough for your gravel plus adventures.