Fitting alternative wheels and tyres to passenger cars is one of the most common and popular of vehicle modifications. In fact, many people fitting different wheels and tyres see them simply as a way of expressing their individuality rather than as a modification.   

But transport authorities and insurance companies see it quite differently. There are definite rules you must follow when selecting alternative wheels and tyres. These rules are set out in section 4.2 of part LS the National Code of Practice for Vehicle Modifications

As vehicle modifications, including fitment of non-standard wheels or tyres, may affect your motor vehicle's insurance you should also talk to your insurer BEFORE you spend your hard earned dollars.