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Changing a Wheel

by Edward Smith

If, during your weekly tyre inspections, you find that your tyres have become worn or damaged, then you will need to change them. When buying new tyres, always remember that it is illegal to mix tyres of a different construction (cross-ply, bias belted or radial) on the same axle; it is recommended that only one type of construction is used for the entire car.

If you are changing the wheel at home; park your car on a firm and level surface and apply the handbrake firmly. Put the car into reverse gear if you have a manual car, or select park (P) if it is an automatic. Read on for safety tips to follow if you have to change a wheel in an emergency ...

Method

Take out the spare wheel, wheel brace and jack; these are often located in the boot of the car, under a cover in the floor.
Chock the wheel diagonally opposite to the one that is being changed with either wooden blocks, bricks or stones.
Remove the plastic wheel trim or cover (you may need to cut the nylon cable ties) using a flat-bladed screwdriver.
Use the wheel brace to slacken the nuts on the affected wheel by about half a turn. The nuts may be very stiff and you may have to use your body weight on the brace to move them.
Consult the owner's manual to find out where to place the jack; this step is essential - if you do not place the jack at the correct lifting point, it may collapse and seriously damage the car.
Use the jack to raise the wheel, sliding the spare wheel under the car near the wheel to be removed as soon as there is enough room. This will act as a safety measure should the car slip off the jack.
Continue to raise the jack until the tyre is 2.5 to 5 cm off the ground.
Once the wheel is just clear of the floor, unscrew the nuts in diagonal pairs and remove. Make sure that you put the nuts somewhere safe, such as a cup, hat or pocket so that they do not roll away.
Lift off the wheel; be careful here as it will be dirty and heavy.
Pull out the spare wheel from underneath the car and slide in the damaged wheel in its place.
Lift the new wheel onto the car, ensuring it is the right way round.
Screw on the wheel nuts in diagonal pairs and turn until finger-tight.
Use the jack to lower the car gently until the tyre of the replaced wheel just touches the floor.
Tighten the wheel nuts lightly, and pull the punctured wheel out from underneath the car.
Finish lowering the car and remove the jack.
Fully tighten one wheel nut securely using the wheel brace, and then tighten the one diagonally (or nearly diagonally) opposite. Tighten the other nuts in a similar way, and then refit the wheel trim.

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