With the stock motor? That is a little short on the gearing. You would want something more around 29-31/75. It'll take some of the torque and give you better speeds. Just be sure to watch the temperatures. I'm not sure how well the RTR motor holds up. Honestly, the next purchase you should make is a new motor The RTR one is okay for now but when you DO upgrade, it should be the first thing to go!