1999 Subaru Impreza Owner's Manual - Page 230

HG0278 Trailer tire condition, size, load rating and proper inflation pressure should be in accordance with the trailer and tire manufacturer's specifications. In the event your vehicle gets a flat tire when towing a trailer, ask a commercial road service to repair the flat tire. If you carry a regular size spare tire in your vehicle or trailer as a precaution against getting a flat tire, be sure that the spare tire is firmly secured. J Trailer towing tips When towing a trailer, steering, stability, stopping distance and braking performance will vary from normal operation. For safety's sake, you should employ extra caution when towing a trailer and you should never speed. You should also keep the following tips in mind: Sufficient time should be taken to learn the "feel" of the vehicle/trailer combination before starting out on a trip. In an area free of traffic, practice turning, stopping and backing up. You should allow for considerably more stopping distance when towing a trailer. Avoid sudden braking because it may result in skidding or jackknifing and loss of control. Avoid abrupt starts and sudden accelerations. If your vehicle has a manual transmission, always start out in 1st gear and release the clutch 7-48