I would like to drive my 19 Z06 next winter. I am tired of looking at it on the hoist with a cover on it. I went to my dealer and he suggested downsizing the rims to 18 or 19 all around with all season tires that are narrower and taller than the stock Michelins for better grip. I have no intention of driving it in the snow. Do any of you know how small a diameter and how narrow a rim can be used, that will leave clearance for the big Brembos that are on this car? Thanks.