Towing and Accessories Tire Pressures when Towing • Observe all regulations and legal requirements in your state/region that When towing a trailer, tire pressures must be apply to trailer towing. Failure to comply adjusted to accommodate the additional load. with regulations can compromise your Keep tires inflated to the pressures shown safety. below (these pressures override the pressures • Adjust side mirrors to provide a clear that are provided on the Tire and Loading rearward view without a significant blind information label): spot. Front Tires Rear Tires Cold Tire • Engage Trailer Mode . (See Trailer Mode Inflation on page 89). Pressure Confirm the following: 245/45R19 245/45R19 45 psi (310 • Model X rests horizontally with the trailer kPa) attached. If the vehicle is tipped up at the front, and down at the rear, check that you 255/45R20 275/45R20 46 psi (320 are not exceeding the maximum towing kPa) capacity and tongue loads provided in 265/45R20 Carrying Capacity. 265/35ZR22 285/35ZR22 50 psi (345 • All trailer hitch parts and attachments , kPa) safety chains, and electrical connectors are in good condition and are properly connected. If any problems are apparent, Warning: Check tire pressures using an do not tow the trailer. accurate pressure gauge when tires are • Trailer lights (brake lights, turn signal cold. Driving one mile (1.6 km) warms the lights, and marker lights) are working tires sufficiently to affect tire pressures. properly. Parking the vehicle in direct sunlight or in • The trailer tongue is securely connected hot weather can also affect tire pressures. to the hitch ball. If you must check warm tires, expect • Safety chains are properly connected increased pressures. Do not let air out of between the trailer and the tow vehicle. warm tires in an attempt to match Cross the safety chains under the tongue recommended cold tire pressures. A hot of the trailer to help prevent the tongue tire at or below the recommended cold from contacting the road if it separates tire inflation pressure is dangerously from the hitch. Leave enough slack in the under-inflated. safety chains to allow for turns and ensure Warning: Never attempt to tow a trailer that the chains can never drag on the when a Model X tire is faulty or has been ground. inflated using a tire repair kit. A • All cargo is secured. temporarily repaired tire is not designed • Wheel chocks are available. to sustain the towing load. Towing using a • The trailer load is evenly distributed such faulty or temporarily repaired tire can that the trailer tongue weight is result in tire failure and loss of vehicle approximately 10% of the total trailer stability. weight, without exceeding the maximum tongue weights provided in Carrying Before Towing a Trailer Capacity. • If the trailer is equipped with a separate Before towing a trailer, you must do the braking system, check that the brakes following: work and are properly adjusted. To • Inflate tires to the cold tire inflation provide safe stopping ability, you must pressure specified in Tire Pressures when balance the trailer brakes with the vehicle Towing. brakes. • Set Suspension to Standard height (touch Note: For general information about trailer Controls > Suspension > Standard). safety provided by the National Highway Traffic Safety Administration, go to: http:// www.nhtsa.gov/cars/problems/Equipment/ towing/Towing.pdf. 88 Model X Owner's Manual