Astra MK5 1.7CDti 280mm 5 hole discs (has 4x100) (60mm centre bore) Work needed: Mill them down to total diameter 277.5mm, you need to take 1.5mm off the thickness where it mates to the hub, and finally get a spigot reducer to fit the disc to the hub exactly A bit long winded but these brakes are awesome, went crazy on track at Donington and they didn't fade once