new wheels. I thought the speed would be off by 4-5 mph but it was only off by 1.4 mph I was doing 80 on cruise control and the GPS said 81.4. Pretty cool unit, just got it yesterday for the boat but it works nice for checking your speed while driving too.
Follow Ups
Used my Garmin GPS today to check my speed w/ the - DAYTONAZ14:30:05 06/07/03