Making Tire With Modifiers ( Merge or Topology Problem )

Hi everyone.I m having a little problem but it turned into terrible one.Array modifiers merge is not working properly.Probably because of the topology but i cant fix it either.I m trying it for days and here i m to find help.I m leaving the blend file here.

nice 3D mesh model
but it is over 1 millions verts
if you have many tires you end up being very sluggish in edit mode

did you think using UV mapping instead to get lower verts count
or a combination of lower res and UV mapping

happy bl