Just something from an industry insiders point of veiw-Many tire shops will not service any vehicles that use spacers or adapters to fit incorrect wheels. Far too much liability involved, especially using the adapters. The shop I work for is one that will not service vehicles with adapters. Best bet is to get the correct wheels, or at least within 1/4" for the absolute least amount of spacer needed. Don't gorget, longr studs will be needed, you should have a minimum of 1 full stud diameter of thread engagement, and preferrable twice that amount.