How to check your car:
To determine if your hitch mounted bike rack will clear your externally mounted spare tire, you will need to take the indicated measurements. Tape a weighted Down string, cord or light rope to the face of the pare tire (this is called a “plumb line”). Measure both the A and B distances. Depending on your receiver tube, compare the measurements needed to clear the spare tire.
Use measurement A (measuring from the face of the hitch) for the following receiver tubes & models:
RT275 (Team Rider, Pro Rider)
RT 575 (’07 Pro Rider, HR1200, HR1400)