BigGary

hey all, i'm going to keep this short and sweet, my car has 4.10 gears, 120km/h on my speedometer reads 107km/h on my buddys gps, 110km/h on speedo reads 98km/h on gps... anyway i was wondering what if any tires i can get a little bit taller to close this accuracy gap, i live in an area in which i have to drive on the highway for long periods quite often and 2200rpm at 105km/h isnt making my wallet happy... oh and the tranny is a T45