HPI's new gears give a 15% taller ratio for 3rd gear, with 26 and 36 tooth gears replacing the standard 24 and 38 tooth gears. The result is the same punch in first and second gears, with more top speed in 3rd gear. So get out your radar gun, these gears will make your Savage faster than ever! These gears fit the original Savage 3 speed transmission and the newer Savage X 3 speed transmissions; they will not fit in 2 speed transmissions.