Zipp 858 NSW D1The 858 NSWs undulating 82mm 85mm deep rim shape is Zipp's highest performing design for aero efficiency and crosswind stability. A tubeless and hookless rim profile provides a seamless tire interface and minimized weight. The 23mm internal width is ide Attributes Axle Type 12mm TA Depth 82mm 85mm Hub Model ZR1 SL Rim Color Black Rim Construction Double wall Rim Drilling 20 Rim inner width range 22 27. 9mm Rim Internal Width 23mm Rim Material Carbon