For the ultimate in 1/87 truck modeling, Masterbilt Models 3D printed replacement wheels are engineered and designed to specifically fit Athearn rubber tires and 1mm steel axle. Axle mounting hole may need to be reamed or sized for a press/friction fit due to 3D printing process. All Masterbilt replacement wheels are sold as individual pieces and can be combined or mixed and matched with any other Masterbilt replacement wheels to enhance your truck modeling. Each axle requires 2 pieces. Recommended finish for aluminum style wheels - airbrushed Molotow chrome gives a near polished aluminum appearance.