Looked at an 87 300SDL that had been fitted with 225/60/15's .Had no issues with hitting anything that I could tell. This is probably the largest size that can be fitted on the factory 6.5 inch width rim . I will probably put this size on my vehicle when funds allow; currently has the 205'65/15's and they look way too small, roll too much on any kind of hard cornering. I keep all of my tires inflated to 36 psi , factory inflation levels are way low ( and this is my opinion ) and are designed to make a car ride smooth.