Zipp 1ZERO HITOP S Tubeless Disc Brake 6-Bolt 29 Rear 24Spokes Micro Spline 12x148mm Boost Standard Graphic A1Zipp's 1ZERO HITOP S MTB wheelset offers riders a combination of exceptional value and performance, enhancing their biking experience. As modern cross country terrains evolve to be more rugged and challenging, there's a growing sentiment that mere stiffness in an XC wheelset no longer suffices. Instead, riders look for a wheelset that resonates with vitality. Zipp's 1ZERO HITOP S carbon rim, crafted using their exclusive HITOP Technology for carbon