Thule bike racks are designed to work with either 1.25" or 2" hitch receivers. Some will work with both sizes. All racks require a minimum of 1.5" from the center of the hitch pin hole to the end of the receiver.
Because of the different brands, trunk designs and mounting positions of hitch receivers, Thule does not have a specific fit guide for hitch-mounted bike racks. Please consult your local Thule dealer for fitting to your vehicle.
You can also find information on hitch rack specifications from the Fitting Compatibility document in the Documents section of each hitch rack product page.