Got it. For Static Meshes, you have two options to test:
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Import wheel mesh with a subdivided cylinder as custom collision (using UCX prefix) Custom collision meshes in Unreal Engine 4 - Tutorial - YouTube
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Add custom shape in the Static mesh editor and set use complex collision as simple
In Blender, make sure to add a subdivision surface modifier, add two edge loops in Edit mode, apply shade smooth, check auto smooth and set 60º and apply modifier at subD 3. Then check smoothing groups, polygroups, triangulate mesh, -Y forward, Zup in the export options as obj. See video.
