- The Z32 wheelset includes a 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 - Upgraded to a 44mm ratchet rings and offer compatibility with Shimano HG, SRAM XD/XDR, Shimano Micro Spline and Campy Ekar 13 speed - 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 - Features a 32mm deep matte alloy rim paired up with our Aero bladed PBO spokes for quick response and acceleration - Light weight and is great for climbing and sprinting - At 19mm internal, the Z32 wheels pair up great with 25-28mm tires for quick response and acceleration while maintaining rolling resistance down - Rear wheels with the HG 11sp road FH body require the 1.8mm spacer (included) for use with Shimano/SRAM 8-11sp HG mountain cassettes - Rear wheels with the XDR driver require the 1.8mm spacer (included) for use with XD cassettes - Spinergy designed Hadley aluminum freehub body - Rim dimensions: 32mm deep 19mm internal - Included: rim tape and truing tool