Free STL file Lego Train Wheels・Design to download and 3D print・Cults
Train Wheels | World of Bricks | Holger Matthes
LEGO Pennsylvania Railroad K4s Pacific completed. It's slightly oversized for 1:38 or 1ft≈1stud scale due to plate-height-compatibility of the driving wheels and articulation clearance for the pilot wheels, but it's close enough. :