Your speedo will be out of calibration with larger tires. And, depending on how much larger you go, your to-the-ground power will suffer as well. Braking performance will suffer as well due to increased rotational mass.Thank you for the info guys. I will keep an eye out for the spacers. My Lattitude has the 17" rims. I will have to investigate what the largest size tires I can use without fender well clearance issues.