These Thule extension arms are bespoke for the Thule Lift V16 bike rack,
The standard height of this rack is made to fit the back of a motorhome wall between 79 – 95cm.
However. some times this rack requires to be fitted to a longer motorhome. Much if you have a motorhome with a standard height bars fitted such as in the Swift group and you wish to remove the standard bike (Sport, Elite or Excellent) and then replace with a Thule V16 rack then you will require these extension bars.
This will then give you the opportunity to fit the V16 to a larger height between the bars of up to 150cms.
You will very probably require to go with this the Thule BC Rail that fits onto the lower rail (302000)