Have you checked out the strenght issues of welding the alloy to the cast alloy wheel, you wouldn't want to have a fracture along the weld half way round a corner. you would really need to make sure your welder knows his stuff to maintain (relivent heat treatment needed) the strenght where metal crystline structure changes from cast to the noncast alloys. if you have done the research I for one would be keen just to be able get a bigger selection choice of tyres. cheers :Tip-Hat: