THE JQRacing 41/13 Tooth Front Overdrive Crowngear. The smaller 41t (43 is stock) is one of the most highly recommended option parts for THE Car. The overdrive ring gear makes the front tires pull more on power. Team drivers who have tried this gear, feel that it makes THE Car easier to drive on power, as the rear end stays more planted. It also changes the feel of the steering, and for most drivers makes it easier to hold their line in corners.