Hey Ian,
For your 2017 Ford Transit T150 you'll need the Rhino-Rack's RTLP legs and adapters because you'll have fixed mounting points on the roof. There are a few different kits depending on the amount of crossbars you'd like to install/how many sets of fixed mounting points you have to use. Rhino-Rack has both silver and black aero crossbars to choose from so I've included both in each build below but you'll only need to select one set of crossbars and then the appropriate feet/adapters... view full answer...