chapter 2 — you and your vehicle Properly inflated tires help  keep you safe by increasing  your vehicle’s traction. 25 Check tire inflation when  the tires are cold. Refer to  the owner’s manual or the  sticker on the driver’s door  for the proper inflation  level. Do not use the  numbers on the side of  the tire. Tires are key pieces of safety equipment, so remember to: Tire tips driving tip Underinflated Overinflated Properly inflated • Keep your tires inflated to the recommended pressure level.  • Check that the tread isn’t too worn. • Replace any tires that show bumps, bulges, cuts, cracks or  exposed belts. • Use only tires that match the specifications for your vehicle. • Make sure all four tires are similar so they work together. • Keep the spare tire at the required air pressure. A space‑saver  spare tire has the correct air pressure marked on its side.  When you use this type of spare tire, never drive faster than 80 km/h. • Rotate tires regularly for even wear. • Avoid sudden starts and stops — they reduce the life of your tires.  ❏ Is the parking brake properly adjusted? ❏ Are the engine hoses cracked or leaking? ❏ Are the engine belts in good condition? ❏ Are all the lights working? (Remember to check both the  brake and backup lights too.) ❏ Are the wipers in good condition? ❏ Do you have enough fuel? ❏ Are the tires properly inflated? ❏ Are the tires in good condition?