@ timelessfahad The front wheels are small and the back wheels are huge slicks - making the front of the car light and the back heavy definitely seems to help.
you can see the small training wheels in the back, without them, the car will definitely hit the back bumper on tech ground, and if the driver's not careful, roll over during a wheelie, either to the side or even backwards.
the front of these cars seems to be lower than the back, i'd think it also helps to do a wheelie. And of course, i'd guess you'll need LOTS of horsepower in your car, otherwise, how can you get the wheels off the ground?! Maybe up to 1,000 torque and horsepower to match for one of these extreme wheelies!