Thank you collector1231, you've been helpful. Even we didn't measure the turn radius ourselves but it should be something around 20cm by sight. Body of 2112 is not attached by screw nor traditional clips. It's simply by snapping on the chassis making use of the body is made by relatively hard plastic. Stock esc is weak and since motor share the same current with the servo on the circuit board, turning will slow down running speed of this car. It can be improved by upgrading it. And yes, by upgrading this car, replacement of the whole system is necessary (not with the motor unless you'd like to go brushless)
Actually, there's another Big Foot GUGO15G we have developed and it's performance is equal to the upgraded version of this 2112. Here it is:
