I am new to the e46 series - we have had an e23 and e38. New 330CiC with SP arriving soon (sitting in Bremerhaven) - I want to purchase extra set of used wheels for winter snow tires. Will 16 wheels clear my rotors or do need to go with 17s? If 16s, what is the correct tire size - - - ditto for the 17s. Thanks for your help!