WinmaX WST Performance Slotted Brake Discs Nissan Silvia S14,S15, R32 GTS-T, Z32 300ZX 280mm diameter front pair. WinmaX brake rotors offer a performace upgrade over OE discs by using high quality castings and improved cooling to be able to handle more spirited driving on the street or track. Disc Specifications: Diameter (mm): 280 Height (mm): 54 Thickness (mm): 30 Minimum Thickness (mm): 28 Centre Hole (mm): 68 Stud Holes: 5 Weight (kg): 8.25