I believe they are lug-centric, and I haven't noticed a difference in the speedo. Fuel mileage appears to be the same and I swapped the TPS monitors from the OEM's with no problems. These wheels are a lot easier to keep clean as well. I priced them at Car-Id, and then Discount Tire (not sure if you have one where you are) price matched them. I got the wheels, tires, warranty, and lifetime mounting and balancing for $2K out the door. I only had them on for about 5 weeks before I swapped back to the OEM's for the winter. Overall, I love them tho and can't wait for winter to be over.