Cars are different from motorcycles or scooters. Cars have a near 50/50 weight distribution while motorbikes have most of the weight at the rear.
The front tire on a motorcycle/scooter is generally more narrow and has a less aggressive tread pattern. Unlike the rear tire, the front tire handles the majority of the bike's braking and is designed to optimize steering and handling. The rear tire on a motorcycle/scooter carries the bulk of the weight of the bike itself, as well as the weight of the rider and passenger, if there is one. The rear tire is designed to carry these loads, and additionally, the extreme load of acceleration. Rear tires generally have a more aggressive tread than the front tires. This beefier tread optimizes traction. Where the front tire design emphasizes braking and steering, the rear tire grips the pavement and pushes the bike forward. Of course, you can use the front tire as the rear tire, but just think of the consequences.
