I have a SS 35th Anniv. that is needing the rear tires to be replaced. (The fronts are still fine but should I change all 4 at once?) I have the factory rims and love the look of them, but would like a more aggressive look from the tire. I'm leaning towards the GY GS-D3 as the tire replacements, so could anyone recommend tire sizes for the fronts and rears. I'm thinking about 255/45/18 for the rears, so how would 245/45/18 look for the fronts? Any other suggestions? Thank you gentlemen for your time.