This H&R DR-System wheel spacer set is designed to increase the track width of your vehicle, providing improved stability and a more aggressive stance. The set includes spacers with a thickness of 30mm per axle. The bolt pattern is 4x100/108, with a center bore of 57.1mm. The bolts used are M12x1.5. This product is compatible with Audi, BMW, Seat, Skoda, and Volkswagen vehicles. The spacers are black in color. Additional specifications include: Vehicle compatibility: Audi 80 - Type: 89/89Q/B4/B4Q. Lowest offset FA/RA: 12 mm. Notes: 3.9 Stud (mm): 108/4 - Centre bore (mm): 57.1 - S=Bolt /M=Nut: S - Thread: M14 x 1.5 - Track widening per axle: DR 30.