1.FITMENTWheel Spacers 4x100mm fit for 19892005 for Miata 19921995 for MX3 Wheel Spacers 2.SPECIFICATIONS4x100 Wheel Spacers 25mm with Thickness 25mm or 1 inch Centerbore 60.1mm Vehicle Bolt Pattern 4x100 Wheel Bolt Pattern 4x100 StudNut Thread 12mmx1.5 3.ADVANTAGE1 INCH WHEEL SPACERS (1)Increasing the extra gap between tire and vehicle hub assembly,improving the vehicle's performance in terms of handling and traction,such as improve flexibility when turning.(2)Giving an aggressive performance to your vehicle.(3)Lowering the center of gravity,benefit for keeping stability at a high speed.(4) Avoid rubbing on the sway bar when install larger tires 4.MANUFACTUREThe 4 lug WHEEL SPACERS 25mm are made from the great true T6 billet aluminum,to ensure the high level of performance and durability for your vehicles.The studs of our Wheel spacers are grade 10.9,heat treated and hardened heavy duty studs