These Whoosh Hang Gliding Wheels are suitable for aluminium fastbars, or airfoil base bars.
The Whoosh Wheel hubs are machined from one solid white nylon block, while the wheels is machined from a solid grey PVC plastic block. These wheels don't interfer with using the VG line.
Another feature of the whoosh wheels, is that they have interchangeabe wheel hubs, so you can simply change the type of wheel hub if you have two gliders with different basebars. The wheels can be changed onto another hub without using any tools.