I have spare set of Model 3 19" Sport wheels and I want to make a full size spare for the MY. the specs on the M3 wheel are 19 x 8.5 wide, offset 40mm. Considering the wheel size for the MY are 9.5" wide, I don't want to assume the OEM 19" MY Tire size would be the same for the 8.5" width M3 rim. I need a tire sizing guru to tell me what 19" tire size I should use on the 8.5" wide wheel to get closest to the overall diameter of the MY OEM tires. According to Modern Spare, the MY OEM tire diameter is 27.7". Thanks for the input.