Stretching a thin tire onto a wide rim decreases a wheel’s standard tire width resulting in a smaller contact patch and less traction. When learning how to drift this can be advantageous since you can get the car sliding sideways at lower speeds. However in pro level drifting events, drifters need as much traction as possible out of their tires to control their drift cars at 100+ mph so initially it seems that hipari tire would not be the best choice but pro drifters found a solution. D1 Grand Prix drifters get around the traction loss issue by using super wide wheels that fit tires they would usually use on their car so the overall contact patch stays the same. This gives the hipari look without loosing traction.

Stretched tires can be used on all four corners of a car but up front, usually you don’t stretch the tires to the same extent as they are stretched on the back. For example, a car with 8.5 inch wide wheels all around, would use 210-220 tires up front and 195-205 tires in the rear. This gives the drift car good grip up front for steering while maintaining the hipari style and handling advantages.

Another thing to note is that stretched tires require a higher psi than normal. 40+ psi is recommend for stretched tires.

The history behind hipari style stretched tires is two fold as poor people have been stretching tires onto wheels they don’t belong forever while euro tuners in Germany and Belgium started stretching their tires out of legal necessity. Local laws there require that the tire tread be within the fender line and with wider or lower offset wheels that can cause problems. To maintain the wide wheel fashion and keep the car street legal, narrow tires are stretched over the wide wheels.