RE: How do I increase my top speed?
how can you run a 15fe? the ss doesn't come with that, it comes with a .12, but anyways, the tallest gear ratios hpi has for that two speed are the red pinion gears, and the spur gears that you need to use with those pinions are shown in the instructions that come with the pinion gears, but i don't recommend you use th 15 fe to turn that ratio, just not enough power, i dropped a .18 hot bodies into mine, lol.