The GR 1600 is DT Swiss` mid level entry to their new line of gravel specific wheels 24mm inner width supports wider tires for a comfortable dependable ride 350 Centerlock hubs with forged freehubs (rear only) and 6 bolt adapter included DT Swiss Aero Comp Wide straight pull spokes with DT ProLock Squorx ProHead aluminum nipples 25mm rim height with a focus on aerodynamics Wheels include tubeless tape, valves, 6 bolt adapters, 5mm endcaps, 15mm endcaps (front only), and Sram XDR compatible freehub body (rear only) 700C FT 24 Thru 12mm Blk GR 1600 350 100 Blk CL/6B DT Aero Comp Wide SP 24H Dbl PVUPC/EAN/GTIN: 7613052372761