1997 Ford Aerostar Owner's Manual - Page 181

Standard length vehicles adapted for trailer tow may require relocation of the underbody spare tire. It is recommended that you secure the tire under the rear-most seat using the hold-down hardware located with the jack. Spare tire stowage (standard length model) Do not tow a trailer until your vehicle has been driven at least 500 miles (800 km). Vehicle Loading/Towing Information Your vehicle's load capacity is designated by weight, not volume, so you cannot necessarily use all available space with large or heavy loads. Maximum safe vehicle weights as well as tire, rim sizes and inflation pressures are specified for your vehicle at the assembly plant on the Safety Compliance Certification Label. The Certification Label is located on the left front door lock facing or the door latch post pillar. 181