SWorkz continues to design new parts to improve the speed of your car, the latest result of which is the high density gear ratio system. Compared to the original 1.0 pitch spur gears, the 0.8 pitch gear ratio gives you more feedback and feeling. The acceleration change is significantly quicker, yet smoother and more range is given from lower torque to higher speeds. 2 clutch bell sizes (16/17T) are available as well as different centre spur gears (57/58/59/60). Your original S35-4 nitro kit comes with 47/13T, so you can start by trying the new 58/16T gears, while with truggy you should use 59/16T or 60/16T.