Description: Improved bicycle brake disc - Increased edge reinforcement strength by more than 30%. Stainless steel brake disc reinforcement material, strong heat dissipation, decontamination and drainage design, high-strength aluminum alloy, stainless steel floating buckle. International standard hole spacing 44mm. Precision design - CNC precision manufacturing, high hardness, unique cooling design, punching, high hardness, the thickness of the outer frame is about 2mm. Stainless steel floating buckle, paint protection, so that the outer plate and the wheel hub are directly locked, leaving room for expansion. Anodized, corrosion-resistant, no rust, martensitic stainless steel, hollow, new upgrade, polished, good corrosion resistance, improved strength, more advanced. Material - The inner frame has good hardness, toughness, metal anodizing treatment, superior corrosion resistance, reinforced angle design, with better tensile strength and absorption. Stainless steel material, hardness 38-42°, good wear resistance, toughness, corrosion resistance, tensile strength, not easy to deform. Specifications - 160MM 180MM 203MM (one package of mounting screws per model of this bicycle brake disc) Note - (Need to know which model you need before ordering to get the right brake disc). Specifications: Product Name: Bicycle Brake Disc Material: metal Size: 160mm 180mm 203mm Hole Center Distance: 44mm Package Includes: 1x Bicycle Brake Disc 6x Screws Notes: 1. Due to the different monitor and light effect, the actual color of the item may be slightly different from the color shown on the pictures. Thanks! 2. Please allow 0.1-2cm measurement deviation due to manual measurement.