Build Log: http://www.rcindia.org/cars/(build-log)-3-wheeled-rc-car-sweepstakes-2014/
Using a reworked DT750 outrunner with a typical 1/10 65mm wheel directly bolted on to the motor shaft, plenty of torque and fast enough to get nasty.
Running on a 3S 1Ah LiPo to keep the weight down.
Using Sweep Racing's soft slicks.
Overall weight is about 600g without battery.