2008 Volvo C30 Owner's Manual - Page 161

2008 Volvo C30 Manual

Page 161 highlights

There are two different types of wheel nut, depending on whether the wheels are steel or aluminum. Steel rims - low nut Steel rims are normally secured using the low type of nut, although steel rims may also use the high type. WARNING Never use the short type of nut for aluminium wheels. This could cause the wheel to come loose. Aluminum wheels - high nut Only the high type of nut can be used for aluminum wheels. This is considerably different from other types of nut because it has a rotating conical thrust washer. NOTE This nut can also be used on steel wheels. Lockable wheel nut If steel wheels with lockable wheel nuts are used in combination with wheel covers, the lockable wheel nut must be fitted to the stud nearest the air valve. The wheel cover cannot otherwise be installed on the wheel. 180 07 Wheels and tires Tire rotation

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There are two different types of wheel nut, depending on whether the wheels are steel or aluminum.
Steel rims - low nut
Steel rims are normally secured using the low type of nut, although steel rims may also use the high type.
WARNING
Never use the short type of nut for aluminium wheels. This could cause the wheel to come loose.
Aluminum wheels - high nut
Only the high type of nut can be used for aluminum wheels. This is considerably different from other types of nut
because it has a rotating conical thrust washer.
NOTE
This nut can also be used on steel wheels.
Lockable wheel nut
If steel wheels with lockable wheel nuts are used in combination with wheel covers, the lockable wheel nut must be
fitted to the stud nearest the air valve. The wheel cover cannot otherwise be installed on the wheel.
180
07 Wheels and tires
Tire rotation