The Elite Rear Wheel Holder has a Velcro strap supporting any different size rims. It is also a great additional product for the Crossbar to turn it to a bike rack. With the right fork mount attached to the front Crossbar, and Rear Wheel Holder, you are able to transport bicycles with different wheel bases, without using the rear crossbar.
All the Elite bicycle racks come with the Elite Rear Wheel Holder
The cup’s diameter is 15cm.