Picking between the two air spring types

Bellow type: A bellow type air spring can be inflated or deflated to suit your desired firmness. Between the two types of air spring, this one offers better load handling capacity because of its larger size. This type is a good choice if you're looking for an air spring which can provide you with an improved lifting capability at lower air pressures. A bellow type air spring is usually used for heavy-duty applications such as trucks and trailers. However, this type may not be suitable for use on car's which can only accommodate smaller-sized suspension mechanisms.

Sleeve type: A sleeve type air spring is designed to have smaller size compared to its bellow counterpart. If you have a vehicle which can't fit something as large as the bellow air spring, then you should go for the sleeve type instead. This doesn't perform well when it comes to heavy loads, though.