Wheels And Rims ....

Im currently considenring changing the stock rims and tires and would like to know from experienced or knowledged people if this would any impact in the tranny? what sizes are recomended and what to avoid?!?

If i do that, then i will possibly have the spare original wheels for sale later on.

I need as much info as i can get.. i want to do it the right way one time one expense..

thank you!