I decided to add spacers as it was cheaper than buying new wheels with the appropriate offset. I bought 1.25" thick spacers and they gave me enough clearance to stop rubbing but still keep the tires from sticking out of the fenders. Great fit, finish and easy installation. Just follow the included instructions and you'll be fine. Be sure to use a torque wrench and set it to the specified torque. Also, use the supplied screw lock to prevent the tabs from loosening over time. The bolts were checked at 100 miles and again at 5000 miles during an oil/tire change and the cleats were still within spec (120-130 lb-ft).