Drawing of wheel rims

I need to work on some bespoke wheel rims designs. Until i have confirmation of an NDA in place i cant elaborate here, but broadly there are two main tyre of wheels rim in agriculture- fixed position that only allow that same distance between wheels so very little versatility, or adjustable which give you many more option through using a variety of standard components but have a higher risk of coming loose. I have some ideas to get the best of both, and need help to prepare drawings for a patent application