A trampoline occupies a large space when it is erected and is generally folded for storage and transport, and put on transport units. There are several variants at disposal for this purpose. The cheapest type of transport for a trampoline is the classical roller stand from Eurotramp. The problem herewith is that all apparatus types of Grand Master when folded together are 2.20 m in height, whereas many doors in gymnasiums are only two metres in height.