The Proaim Skateboard Plus Kit allows you to place a doorway dolly on tracks with a center distance of 22.5 to 27″—and adjustment to different track widths is completely tool-free. It supports dollies with wheel diameters between 8 and 13″ and has a 1500 lb payload. The kit consists of four sets of eight skate wheels and two dolly platforms.
The wheel sets have an articulating split carriage design that allows them to be used smoothly on straight or curved tracks. The wheels have a high-density design to withstand heavy loads for extended periods without getting bumpy spots on them. Smooth movement is also due in part to fully sealed ball bearings designed for heavy loads. Compatible dollies and tracks include the Proaim Quad-4 Dolly and Stream 16′ Dolly Tracks.