This is a 3D model for 3D printing wheels of scale models of freight and passenger cars. Scale 1:87. The wheel diameter is 10.9 mm, which corresponds to the prototype wheel with a diameter of 950 mm. It is best to print on a photopolymer 3D printer, but FDM printing also gives good results.Since photopolymer resin has a high coefficient of friction, this set includes both a complete wheelset and wheels separately from the axle. This makes it possible to place individual wheels on a metal axle and get a smoother movement of the model.