Thule - BackPac 4th Adaptor
Allows an extra bike to be carried with the Thule 973 BackPac, simply attach to the existing rack. Only suitable for certain applications due to the additional weight, check your Thule fitting kit manual for details. Requires 3rd bike adaptor (97324) for fitment.
Includes: Base extension (1x) / Wheel tray and straps (1x) / Frame holder (1x) / Required Hardware.