Thule Apex XT Hanging Hitch Bike Rack, Carries 4 Bikes, Perfect for Traveling with Multiple Bikes - Quick, Tool-Free Installation, Suitable for a Wide Variety of Bike Sizes and Frame Styles :
Thule VeloCompact | Thule | United Kingdom
4 x Atera GIRO AF+ aluminium bike carriers with roof bars.
Thule+939+Velospace+XT+4+Bike+Cycle+Carrier+Rack+Towbar+Mount+%7C+Inc+4th+Adapter for sale online | eBay
4 x Thule ProRide 598 silver bike carriers with locking roof bars.
Peruzzo Arezzo 4 Bike Cycle Carrier | Available from Driveden today
THULE VeloCompact 4 Bike Cycle Carrier 13 pin (927 + 4th Bike Adaptor)