thats good but if u have double battery mod or tiple u should get the 3:43:1 gears...u can get them with the hotwheels k.i.t cars and they also come with a nice 3.0 motor..i only have 1 battery and never tried the gears with them yet because i dont have bateries in my controller...but my freaind has a double and triple battery mod and he said they work great for him