how to model a car wheel on catia
Perhaps it is better that you buy a book explaining how to work Catia.....
it is a good thing thant engineers help each other, but it is not the intention of the GC community, that you ask us how to do your work.
And to be honest...a car wheels is not rocket science...it is one of the simplest
items to model...
My suggestion to you....just start modeling and in the process learn, and perhaps your 3d program has a HELP function....this might also help.