SB-packed, Center Lock, Disc thickness: 1.8 mm E-bike compatible, 2-piece, Stainless steel disc and spider, light and durable, optimised heat dissipation, more stability, Lockring not included, compatible with: Avid, Hayes, Magura, Shimano, Sram, Tektro Article type Construction two-piece Mount Center Lock (splined) Diameter 140.0 mm Features optimised heat dissipation Main color silver Thickness 1.8 mm