Tyre Replacement and Wheel Interchanging

Warning
Use only wheels and wheel nuts supplied by Aston Martin. After market wheels or wheel nuts may not install or function correctly and could cause injury or damage.

Tyre Replacement and Wheel Interchanging

Caution
When a new tyre is installed, always renew the tyre valve.

When replacement of tyres is required it is preferable to install a complete vehicle set. Should either the front or rear tyres only show excessive wear, new tyres must be installed to replace worn ones. Under no circumstances interchange tyres from side to side, front to rear or vice versa as individual tyre wear produces unique characteristics depending upon their position. If the position is changed after wear has occurred, the performance of the tyre will be adversely affected.

New tyres must be balanced before installing to the vehicle.

Winter (Snow) tyres

Winter tyres must only be installed in complete four-wheel sets of the same type. The maximum speed with winter tyres installed (without snow chains) is 210 km/h (131 mile/h) for H rated tyres or 240 km/h (149 mile/h) for V rated tyres. When using snow chains, note that:

• Snow chains must only be installed to the rear wheels
• Only Aston Martin snow chains should be used
• Snow chains must not be used on roads which are clear of snow
• The maximum speed with winter tyres and snow chains fitted is 48 km/h (30 mile/h)
• Traction control must be switched Off when using snow chains

Inspection and Verification

Verify the customer's concern by driving the vehicle.
Visually inspect for obvious signs of damage:

Visual Inspection Chart

• Incorrect tyre pressure
• Wheel imbalance
• Bulges (blister)
• Cuts
• Abrasions
• Tyres worn beyond tread wear indicators
• Ply separation
• Embedded objects
• Impact damage
• Incorrect speed rating
• Incorrect load rating
• Tyres installed with the 'Outside' marking not shown

1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
2. If the concern is not visually evident, verify the symptom and refer to Symptom Chart.

Tyre Wear

Tread wear indicators (A) are moulded into the bottom of the tread grooves across the width of the tyre. When the tread wear indicators become visible at the surface of the tread, in two or more adjacent tread grooves, only 1.6 mm of tread remains.

Tyre tread depth and condition must comply with prevailing local legislation.

To maximize tyre performance, inspect the tyres for signs of incorrect inflation and uneven wear which may indicate a need for balancing, rotation or front suspension alignment. tyres should also be checked frequently for cuts, stone bruises, abrasions, blisters, and for objects that may have become embedded in the tread. More frequent inspections are recommended when rapid or extreme temperature changes occur or when road surfaces are rough or occasionally littered with debris.

Tyre Wear Diagnosis

New tyres should be installed if the wear indictors are exposed or if there is severe shoulder wear. Shoulder wear is usually caused by either excessive camber or excessive toe on radial tyres.

Sometimes incorrect rear toe settings or damaged struts will cause severe cupping' or scalloped' tyre wear on non-drive wheels.

Incorrect rear toe alignment will also cause other unusual wear patterns.