I ran 110 on radar in a 1000ft with the stock gearing with speed track and picks and speedo read about 4-7 mph higher can't remember.With the stock track and 192 trail studs it ran I believe 96 and speedo ran 115 in a 1000ft.Across the lake with the stock gearing and trail studs the speedo would go about 1" past 120mph in the right condition's with clutching and modified airbox.