The first thing you should look at when selecting a scooter is the wheel size. They mainly come with either large wheels or small wheels. Larger ones absorb shock more efficiently and allow you to cover more ground with each push. However, they have a larger turning circle than smaller wheels and they also contribute to the overall weight of the scooter.
The deck is an important consideration and can be divided into two. The size of the deck as well as height of the deck. Generally, the larger the deck the more comfortable it is to get on and off when using the scooter. The deck height refers to the distance between the base of the deck and the ground. The closer the deck is to the ground the more comfortable the adult scooter. This is because the leg sitting on the deck is less bent at the knee compared to if the deck was higher.
In such an instance there would be more pressure at the knee. However, keep in mind that a large deck translates to more weight which means that you will require more energy to propel as well as to stop the scooter. A scooter with a low set deck also has a higher chance of scrapping the ground especially on bumps.
Suspension system is important depending on your personal preference. If you do not mind a little more weight on your scooter then a model with suspension will work fine for you. It can be found both on the front and back wheels or just on the front wheel. Suspension makes a scooter better absorb the vibrations on uneven ground.
However, coupled with making the scooter heavier, it does increase the chances of something going wrong since there are more parts involved. Also, such scooters tend to make more of a rattling and squeaking noise due to the fact that there are more moving parts. The suspension also absorbs some of the energy from the kick which makes the scooter less responsive.
Folding mechanism is yet another factor to consider. Depending on how frequently you will be using the scooter, you might opt for one with a simple single action folding mechanism. This is especially the case when you plan to be using the scooter to commute to work on a daily basis. You can pick it up and store it in the office to use again in the evening.
The braking mechanism will help slow down the scooter and bring it to a complete stop at your convenience. There are generally two types of brakes. The first is the most common and involves stepping on the rear fender. The friction then stops the scooter. You can also find scooters that have bicycle style braking system at the handle. These are however less common. You can choose one that you feel is most convenient. However, remember that extra parts mean extra weight.