255/35/19 has a diameter of 26 inches, 245/40/17 (stock rear size for SLK32) has a diameter of 24.7 inches. I am guessing 255/35/19 would rub on an SLK without rolling the fenders. Plus I wouldnt want that extra diameter effecting speedo/odometer. I wouldnt want the extra tire weight either.Thanks for the info. The XFire uses larger wheels in the rear. Has anyone done this on their SLK 320 / SLK32 AMG?
XFire standard wheels;
• Front tires: 225/40ZR18
• Front wheel size: 18 X 7.5 inches
• Rear tires: 255/35ZR19
• Rear wheel size: 19 X 9 inches