Check out MOTORIZED RIM WHEEL HUB BLDC MOTOR WHEELBARROW ENGINE BARROW KIT 3D model on CGTrader for $30. High-quality mesh by SURF3D: 335485 polys, 288448 vertices.
STL (Stereolithography, filesize: 16 MB), OBJ (OBJ, filesize: 32.9 MB), 3DM (Rhinoceros 3D, filesize: 62.6 MB), 3DS (3D Studio, filesize: 10 MB), DWG (AutoCAD, filesize: 21.7 MB), BLEND (Blender, filesize: 30.3 MB), DAE (Collada, filesize: 54.1 MB), SAT (3D ACIS, filesize: 44.9 MB), GLTF (glTF, filesize: 10.9 MB), SKP (Sketchup, filesize: 28 MB), STP (STEP, filesize: 36.3 MB), IGE (IGES, filesize: 54.4 MB), FBX (Autodesk FBX, filesize: 10.9 MB), MAX (Autodesk 3ds Max, filesize: 81.5 MB)