For transport, you can mount the Rev Tent to any ARB Roof Rack.
For sleeping with the Rev Rack Tent mounted directly to the ARB Flat Rack (steel or alloy) you would need the size 2200 mm x 1250mm.
For sleeping you can also mount the Rev Rack Tent directly to the new ARB Base Rack: 8 beam only (their largest). Choose "other" for your mounting system.
For sleep on top of a vehicle on smaller ARB roof racks, you would need to purchase the Rev Roof Top Tent.
NOTE: Any sort of side rails or raised perimeter will interfere with the opening and use of the Rev Rack Tent.