RCPRESS Techvid: Installing larger rear wheels on a RWD:
Larger rear tires can create a traction imbalance between the front and rear wheels. Since RWD vehicles primarily rely on the rear wheels for propulsion, larger rear tires may provide more traction to the rear axle than the front. This can result in oversteer, where the rear of the vehicle has more grip than the front, potentially making the vehicle tail-happy and harder to control in turns.
Installing larger rear tires can alter the vehicle’s handling characteristics. It may increase the tendency for the rear of the vehicle to slide or break traction during cornering, especially in wet or slippery conditions.
When there are larger wheels at the rear end and also a high torque motor, the car can get the front wheels off the ground very easily during acceleration! You do not need a very fast motor for this .. in the example below the car is fitted with a 550 brushed motor only. All that matters is torque here!
