Because the racks mount right to your frame, they are super stable even with longboards, but your short board will fit in there just fine too. The rear mount is to your seatpost OR your rear rack, your choice, no special rack required. The splined bars slide into the mounted tubes and are held in place with a simple push button release. Push the button to remove them, slide them in till the button clicks to put them in, that’s all there is to it. No point having to deal with the bars on your bike when you aren’t actually using them.